diff --git a/lib/Exceptions/AppException.php b/lib/Exceptions/AppException.php
new file mode 100644
index 00000000..3b0219db
--- /dev/null
+++ b/lib/Exceptions/AppException.php
@@ -0,0 +1,5 @@
+<?
+namespace Exceptions;
+
+class AppException extends \Exception{
+}
diff --git a/lib/Exceptions/EbookParsingException.php b/lib/Exceptions/EbookParsingException.php
index e4ed164a..ebc6ce0c 100644
--- a/lib/Exceptions/EbookParsingException.php
+++ b/lib/Exceptions/EbookParsingException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class EbookParsingException extends SeException{
+class EbookParsingException extends AppException{
 }
diff --git a/lib/Exceptions/InvalidAuthorException.php b/lib/Exceptions/InvalidAuthorException.php
index 4ad6d751..4e4fa05e 100644
--- a/lib/Exceptions/InvalidAuthorException.php
+++ b/lib/Exceptions/InvalidAuthorException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class InvalidAuthorException extends SeException{
+class InvalidAuthorException extends AppException{
 }
diff --git a/lib/Exceptions/InvalidCaptchaException.php b/lib/Exceptions/InvalidCaptchaException.php
index f39e582c..47e23d6a 100644
--- a/lib/Exceptions/InvalidCaptchaException.php
+++ b/lib/Exceptions/InvalidCaptchaException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidCaptchaException extends SeException{
+class InvalidCaptchaException extends AppException{
 	protected $message = 'We couldn’t validate your CAPTCHA response.';
 }
diff --git a/lib/Exceptions/InvalidCollectionException.php b/lib/Exceptions/InvalidCollectionException.php
index f36f3eec..83897dc5 100644
--- a/lib/Exceptions/InvalidCollectionException.php
+++ b/lib/Exceptions/InvalidCollectionException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class InvalidCollectionException extends SeException{
+class InvalidCollectionException extends AppException{
 }
diff --git a/lib/Exceptions/InvalidCredentialsException.php b/lib/Exceptions/InvalidCredentialsException.php
index e1f44969..5b0dcb0f 100644
--- a/lib/Exceptions/InvalidCredentialsException.php
+++ b/lib/Exceptions/InvalidCredentialsException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidCredentialsException extends SeException{
+class InvalidCredentialsException extends AppException{
 	protected $message = 'Invalid credentials.';
 }
diff --git a/lib/Exceptions/InvalidEbookException.php b/lib/Exceptions/InvalidEbookException.php
index ef517d11..0ba51e9d 100644
--- a/lib/Exceptions/InvalidEbookException.php
+++ b/lib/Exceptions/InvalidEbookException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class InvalidEbookException extends SeException{
+class InvalidEbookException extends AppException{
 }
diff --git a/lib/Exceptions/InvalidEmailException.php b/lib/Exceptions/InvalidEmailException.php
index af36cf67..d2af6ef1 100644
--- a/lib/Exceptions/InvalidEmailException.php
+++ b/lib/Exceptions/InvalidEmailException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidEmailException extends SeException{
+class InvalidEmailException extends AppException{
 	protected $message = 'We couldn’t understand your email address.';
 }
diff --git a/lib/Exceptions/InvalidFileException.php b/lib/Exceptions/InvalidFileException.php
index f0d19265..e9e61e2b 100644
--- a/lib/Exceptions/InvalidFileException.php
+++ b/lib/Exceptions/InvalidFileException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class InvalidFileException extends SeException{
+class InvalidFileException extends AppException{
 }
diff --git a/lib/Exceptions/InvalidNewsletterSubscriptionException.php b/lib/Exceptions/InvalidNewsletterSubscriptionException.php
index 5a5a6909..0c55f4e0 100644
--- a/lib/Exceptions/InvalidNewsletterSubscriptionException.php
+++ b/lib/Exceptions/InvalidNewsletterSubscriptionException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidNewsletterSubscriptionException extends SeException{
+class InvalidNewsletterSubscriptionException extends AppException{
 	protected $message = 'We couldn’t find you in our newsletter subscribers list.';
 }
diff --git a/lib/Exceptions/InvalidPatronException.php b/lib/Exceptions/InvalidPatronException.php
index b6920f90..aa7ff07e 100644
--- a/lib/Exceptions/InvalidPatronException.php
+++ b/lib/Exceptions/InvalidPatronException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidPatronException extends SeException{
+class InvalidPatronException extends AppException{
 	protected $message = 'We couldn’t locate you in the Patrons Circle.';
 }
diff --git a/lib/Exceptions/InvalidPermissionsException.php b/lib/Exceptions/InvalidPermissionsException.php
index 2de259a4..0e8ae3c1 100644
--- a/lib/Exceptions/InvalidPermissionsException.php
+++ b/lib/Exceptions/InvalidPermissionsException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidPermissionsException extends SeException{
+class InvalidPermissionsException extends AppException{
 	protected $message = 'You don’t have permission to perform that action.';
 }
diff --git a/lib/Exceptions/InvalidPollException.php b/lib/Exceptions/InvalidPollException.php
index 65703934..cda0f6c5 100644
--- a/lib/Exceptions/InvalidPollException.php
+++ b/lib/Exceptions/InvalidPollException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidPollException extends SeException{
+class InvalidPollException extends AppException{
 	protected $message = 'We couldn’t locate that poll.';
 }
diff --git a/lib/Exceptions/InvalidPollItemException.php b/lib/Exceptions/InvalidPollItemException.php
index 6a4fd37d..c3fd6753 100644
--- a/lib/Exceptions/InvalidPollItemException.php
+++ b/lib/Exceptions/InvalidPollItemException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidPollItemException extends SeException{
+class InvalidPollItemException extends AppException{
 	protected $message = 'We couldn’t locate that poll item.';
 }
diff --git a/lib/Exceptions/InvalidPollVoteException.php b/lib/Exceptions/InvalidPollVoteException.php
index ac11efce..04dd4934 100644
--- a/lib/Exceptions/InvalidPollVoteException.php
+++ b/lib/Exceptions/InvalidPollVoteException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidPollVoteException extends SeException{
+class InvalidPollVoteException extends AppException{
 	protected $message = 'We couldn’t locate that vote.';
 }
diff --git a/lib/Exceptions/InvalidRequestException.php b/lib/Exceptions/InvalidRequestException.php
index d4bf6ce0..2edc06ad 100644
--- a/lib/Exceptions/InvalidRequestException.php
+++ b/lib/Exceptions/InvalidRequestException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidRequestException extends SeException{
+class InvalidRequestException extends AppException{
 	protected $message = 'Invalid request.';
 }
diff --git a/lib/Exceptions/InvalidSessionException.php b/lib/Exceptions/InvalidSessionException.php
index 7cecb287..90930d23 100644
--- a/lib/Exceptions/InvalidSessionException.php
+++ b/lib/Exceptions/InvalidSessionException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class InvalidSessionException extends SeException{
+class InvalidSessionException extends AppException{
 }
diff --git a/lib/Exceptions/InvalidUserException.php b/lib/Exceptions/InvalidUserException.php
index e531bf4c..380f433c 100644
--- a/lib/Exceptions/InvalidUserException.php
+++ b/lib/Exceptions/InvalidUserException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class InvalidUserException extends SeException{
+class InvalidUserException extends AppException{
 	protected $message = 'We couldn’t locate you in our system.';
 }
diff --git a/lib/Exceptions/LoginRequiredException.php b/lib/Exceptions/LoginRequiredException.php
index ed51078a..cde2721e 100644
--- a/lib/Exceptions/LoginRequiredException.php
+++ b/lib/Exceptions/LoginRequiredException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class LoginRequiredException extends SeException{
+class LoginRequiredException extends AppException{
 }
diff --git a/lib/Exceptions/NewsletterRequiredException.php b/lib/Exceptions/NewsletterRequiredException.php
index 7b962fc5..53a00532 100644
--- a/lib/Exceptions/NewsletterRequiredException.php
+++ b/lib/Exceptions/NewsletterRequiredException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class NewsletterRequiredException extends SeException{
+class NewsletterRequiredException extends AppException{
 	protected $message = 'You must select at least one newsletter to subscribe to.';
 }
diff --git a/lib/Exceptions/NewsletterSubscriptionExistsException.php b/lib/Exceptions/NewsletterSubscriptionExistsException.php
index 243090ae..edf0274c 100644
--- a/lib/Exceptions/NewsletterSubscriptionExistsException.php
+++ b/lib/Exceptions/NewsletterSubscriptionExistsException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class NewsletterSubscriptionExistsException extends SeException{
+class NewsletterSubscriptionExistsException extends AppException{
 	protected $message = 'You’re already subscribed to the newsletter.';
 }
diff --git a/lib/Exceptions/NoopException.php b/lib/Exceptions/NoopException.php
index f904fc20..39063a9a 100644
--- a/lib/Exceptions/NoopException.php
+++ b/lib/Exceptions/NoopException.php
@@ -1,5 +1,5 @@
 <?
 namespace Exceptions;
 
-class NoopException extends SeException{
+class NoopException extends AppException{
 }
diff --git a/lib/Exceptions/PaymentExistsException.php b/lib/Exceptions/PaymentExistsException.php
index 72607d94..cb715cb3 100644
--- a/lib/Exceptions/PaymentExistsException.php
+++ b/lib/Exceptions/PaymentExistsException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class PaymentExistsException extends SeException{
+class PaymentExistsException extends AppException{
 	protected $message = 'This transaction ID already exists.';
 }
diff --git a/lib/Exceptions/PollClosedException.php b/lib/Exceptions/PollClosedException.php
index 810a3da6..f3a13f98 100644
--- a/lib/Exceptions/PollClosedException.php
+++ b/lib/Exceptions/PollClosedException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class PollClosedException extends SeException{
+class PollClosedException extends AppException{
 	protected $message = 'This poll is not open to voting right now.';
 }
diff --git a/lib/Exceptions/PollItemRequiredException.php b/lib/Exceptions/PollItemRequiredException.php
index 63b0a14f..a5dbff60 100644
--- a/lib/Exceptions/PollItemRequiredException.php
+++ b/lib/Exceptions/PollItemRequiredException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class PollItemRequiredException extends SeException{
+class PollItemRequiredException extends AppException{
 	protected $message = 'You must select an item to vote on.';
 }
diff --git a/lib/Exceptions/PollVoteExistsException.php b/lib/Exceptions/PollVoteExistsException.php
index 35be12af..7869c5d2 100644
--- a/lib/Exceptions/PollVoteExistsException.php
+++ b/lib/Exceptions/PollVoteExistsException.php
@@ -1,7 +1,7 @@
 <?
 namespace Exceptions;
 
-class PollVoteExistsException extends SeException{
+class PollVoteExistsException extends AppException{
 	public $Vote = null;
 	protected $message = 'You’ve already voted in this poll.';
 
diff --git a/lib/Exceptions/SeException.php b/lib/Exceptions/SeException.php
deleted file mode 100644
index 14b2403f..00000000
--- a/lib/Exceptions/SeException.php
+++ /dev/null
@@ -1,5 +0,0 @@
-<?
-namespace Exceptions;
-
-class SeException extends \Exception{
-}
diff --git a/lib/Exceptions/SeeOtherEbookException.php b/lib/Exceptions/SeeOtherEbookException.php
index 3ad92aaa..30411f89 100644
--- a/lib/Exceptions/SeeOtherEbookException.php
+++ b/lib/Exceptions/SeeOtherEbookException.php
@@ -1,7 +1,7 @@
 <?
 namespace Exceptions;
 
-class SeeOtherEbookException extends SeException{
+class SeeOtherEbookException extends AppException{
 	public $Url;
 
 	public function __construct(string $url = ''){
diff --git a/lib/Exceptions/UserExistsException.php b/lib/Exceptions/UserExistsException.php
index f24594c8..ad89f6ef 100644
--- a/lib/Exceptions/UserExistsException.php
+++ b/lib/Exceptions/UserExistsException.php
@@ -1,6 +1,6 @@
 <?
 namespace Exceptions;
 
-class UserExistsException extends SeException{
+class UserExistsException extends AppException{
 	protected $message = 'This email already exists in the database.';
 }
diff --git a/lib/Exceptions/ValidationException.php b/lib/Exceptions/ValidationException.php
index 32b1701a..04a9bf1c 100644
--- a/lib/Exceptions/ValidationException.php
+++ b/lib/Exceptions/ValidationException.php
@@ -1,7 +1,7 @@
 <?
 namespace Exceptions;
 
-class ValidationException extends SeException{
+class ValidationException extends AppException{
 	public $Exceptions = [];
 	public $HasExceptions = false;
 	public $IsFatal = false;
diff --git a/lib/Exceptions/WebhookException.php b/lib/Exceptions/WebhookException.php
index ee183597..3ad9f057 100644
--- a/lib/Exceptions/WebhookException.php
+++ b/lib/Exceptions/WebhookException.php
@@ -1,7 +1,7 @@
 <?
 namespace Exceptions;
 
-class WebhookException extends SeException{
+class WebhookException extends AppException{
 	public $PostData;
 
 	public function __construct(string $message = '', string $data = null){
diff --git a/lib/Library.php b/lib/Library.php
index 0a9528da..417839d6 100644
--- a/lib/Library.php
+++ b/lib/Library.php
@@ -331,7 +331,7 @@ class Library{
 	public static function RebuildBulkDownloadsCache(): array{
 		$collator = Collator::create('en_US'); // Used for sorting letters with diacritics like in author names
 		if($collator === null){
-			throw new Exceptions\SeException('Couldn\'t create collator object when rebuilding bulk download cache.');
+			throw new Exceptions\AppException('Couldn\'t create collator object when rebuilding bulk download cache.');
 		}
 		$months = [];
 		$subjects = [];
@@ -396,7 +396,7 @@ class Library{
 		$retval = null;
 		$collator = Collator::create('en_US'); // Used for sorting letters with diacritics like in author names
 		if($collator === null){
-			throw new Exceptions\SeException('Couldn\'t create collator object when rebuilding feeds cache.');
+			throw new Exceptions\AppException('Couldn\'t create collator object when rebuilding feeds cache.');
 		}
 
 		foreach($feedTypes as $type){
@@ -449,7 +449,7 @@ class Library{
 
 		$collator = Collator::create('en_US'); // Used for sorting letters with diacritics like in author names
 		if($collator === null){
-			throw new Exceptions\SeException('Couldn\'t create collator object when rebuilding cache.');
+			throw new Exceptions\AppException('Couldn\'t create collator object when rebuilding cache.');
 		}
 
 		$ebooks = [];
diff --git a/www/newsletter/subscriptions/get.php b/www/newsletter/subscriptions/get.php
index da78295a..8aa12f75 100644
--- a/www/newsletter/subscriptions/get.php
+++ b/www/newsletter/subscriptions/get.php
@@ -39,7 +39,7 @@ try{
 		http_response_code(201);
 	}
 }
-catch(Exceptions\SeException){
+catch(Exceptions\AppException){
 	Template::Emit404();
 }
 
diff --git a/www/newsletter/subscriptions/post.php b/www/newsletter/subscriptions/post.php
index 51b5a947..bf8d0159 100644
--- a/www/newsletter/subscriptions/post.php
+++ b/www/newsletter/subscriptions/post.php
@@ -101,7 +101,7 @@ catch(Exceptions\NewsletterSubscriptionExistsException){
 		http_response_code(409);
 	}
 }
-catch(Exceptions\SeException $ex){
+catch(Exceptions\AppException $ex){
 	// Validation failed
 	if($requestType == WEB){
 		$_SESSION['subscription'] = $subscription;
diff --git a/www/polls/get.php b/www/polls/get.php
index c153c375..faf7f41a 100644
--- a/www/polls/get.php
+++ b/www/polls/get.php
@@ -20,13 +20,13 @@ try{
 		try{
 			PollVote::Get($poll->UrlName, $GLOBALS['User']->UserId);
 		}
-		catch(Exceptions\SeException){
+		catch(Exceptions\AppException){
 			// User has already voted
 			$canVote = true;
 		}
 	}
 }
-catch(Exceptions\SeException){
+catch(Exceptions\AppException){
 	Template::Emit404();
 }
 
diff --git a/www/polls/votes/get.php b/www/polls/votes/get.php
index 20d52c58..a6d8c8dd 100644
--- a/www/polls/votes/get.php
+++ b/www/polls/votes/get.php
@@ -17,7 +17,7 @@ try{
 		session_unset();
 	}
 }
-catch(Exceptions\SeException){
+catch(Exceptions\AppException){
 	Template::Emit404();
 }
 
diff --git a/www/polls/votes/index.php b/www/polls/votes/index.php
index 284fad64..d8580944 100644
--- a/www/polls/votes/index.php
+++ b/www/polls/votes/index.php
@@ -6,7 +6,7 @@ $poll = new Poll();
 try{
 	$poll = Poll::GetByUrlName(HttpInput::Str(GET, 'pollurlname', false));
 }
-catch(Exceptions\SeException){
+catch(Exceptions\AppException){
 	Template::Emit404();
 }
 
diff --git a/www/polls/votes/post.php b/www/polls/votes/post.php
index 9fea1ad9..250891bb 100644
--- a/www/polls/votes/post.php
+++ b/www/polls/votes/post.php
@@ -33,7 +33,7 @@ try{
 		header('Location: ' . $vote->Url);
 	}
 }
-catch(Exceptions\SeException $ex){
+catch(Exceptions\AppException $ex){
 	// Validation failed
 	if($requestType == WEB){
 		$_SESSION['vote'] = $vote;
diff --git a/www/sessions/post.php b/www/sessions/post.php
index 3a58876e..1f973f6f 100644
--- a/www/sessions/post.php
+++ b/www/sessions/post.php
@@ -34,7 +34,7 @@ try{
 		header('Location: ' . $session->Url);
 	}
 }
-catch(Exceptions\SeException $ex){
+catch(Exceptions\AppException $ex){
 	// Login failed
 	if($requestType == WEB){
 		$_SESSION['email'] = $email;