diff --git a/phpBB/includes/acp/acp_extensions.php b/phpBB/includes/acp/acp_extensions.php
index e08c2e341b..626f1b09c1 100644
--- a/phpBB/includes/acp/acp_extensions.php
+++ b/phpBB/includes/acp/acp_extensions.php
@@ -276,6 +276,12 @@ class acp_extensions
 				{
 					$this->template->assign_var('MIGRATOR_ERROR', $e->getLocalisedMessage($this->user));
 				}
+				catch (\Exception $e)
+				{
+					$stack_trace = phpbb_filter_root_path(str_replace("\n", '<br>', $e->getTraceAsString()));
+					$message = $e->getMessage();
+					$this->template->assign_var('MIGRATOR_ERROR', '<b>' . $message . '</b><br><br>' . $stack_trace);
+				}
 
 				$this->tpl_name = 'acp_ext_enable';
 
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index f725d5f996..72241b52f0 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -2716,7 +2716,7 @@ function get_backtrace()
 		// Only show function arguments for include etc.
 		// Other parameters may contain sensible information
 		$argument = '';
-		if (!empty($trace['args'][0]) && in_array($trace['function'], array('include', 'require', 'include_once', 'require_once')))
+		if (!empty($trace['args'][0]) && in_array($trace['function'], array('include', 'require', 'include_once', 'require_once', 'try_apply')))
 		{
 			$argument = htmlspecialchars(phpbb_filter_root_path($trace['args'][0]), ENT_COMPAT);
 		}
diff --git a/phpBB/install/startup.php b/phpBB/install/startup.php
index b8ceb37342..0cff634795 100644
--- a/phpBB/install/startup.php
+++ b/phpBB/install/startup.php
@@ -107,7 +107,7 @@ function installer_msg_handler($errno, $msg_text, $errfile, $errline): bool
 				{
 					/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
 					$iohandler = $phpbb_installer_container->get('installer.helper.iohandler');
-					$iohandler->add_error_message($msg);
+					$iohandler->add_error_message($msg, get_backtrace());
 					$iohandler->send_response(true);
 					exit();
 				}
diff --git a/phpBB/phpbb/db/tools/doctrine.php b/phpBB/phpbb/db/tools/doctrine.php
index aaf44aed68..65fd6b39aa 100644
--- a/phpBB/phpbb/db/tools/doctrine.php
+++ b/phpBB/phpbb/db/tools/doctrine.php
@@ -458,34 +458,26 @@ class doctrine implements tools_interface
 	 */
 	protected function alter_schema(callable $callback)
 	{
-		try
+		$current_schema = $this->get_schema();
+		$new_schema = clone $current_schema;
+		call_user_func($callback, $new_schema);
+
+		$comparator = new comparator();
+		$schemaDiff = $comparator->compareSchemas($current_schema, $new_schema);
+		$queries = $schemaDiff->toSql($this->get_schema_manager()->getDatabasePlatform());
+
+		if ($this->return_statements)
 		{
-			$current_schema = $this->get_schema();
-			$new_schema = clone $current_schema;
-			call_user_func($callback, $new_schema);
-
-			$comparator = new comparator();
-			$schemaDiff = $comparator->compareSchemas($current_schema, $new_schema);
-			$queries = $schemaDiff->toSql($this->get_schema_manager()->getDatabasePlatform());
-
-			if ($this->return_statements)
-			{
-				return $queries;
-			}
-
-			foreach ($queries as $query)
-			{
-				// executeQuery() must be used here because $query might return a result set, for instance REPAIR does
-				$this->connection->executeQuery($query);
-			}
-
-			return true;
+			return $queries;
 		}
-		catch (Exception $e)
+
+		foreach ($queries as $query)
 		{
-			// @todo: check if it makes sense to properly handle the exception
-			return [$e->getMessage()];
+			// executeQuery() must be used here because $query might return a result set, for instance REPAIR does
+			$this->connection->executeQuery($query);
 		}
+
+		return true;
 	}
 
 	/**
diff --git a/phpBB/phpbb/install/installer.php b/phpBB/phpbb/install/installer.php
index 23ab5df919..3664b39f2d 100644
--- a/phpBB/phpbb/install/installer.php
+++ b/phpBB/phpbb/install/installer.php
@@ -280,7 +280,9 @@ class installer
 		}
 		catch (\Exception $e)
 		{
-			$this->iohandler->add_error_message($e->getMessage());
+			$stack_trace = phpbb_filter_root_path(str_replace("\n", '<br>', $e->getTraceAsString()));
+			$message = $e->getMessage();
+			$this->iohandler->add_error_message($message, $stack_trace);
 			$this->iohandler->send_response(true);
 			$fail_cleanup = true;
 		}