Version 4.7.23

system/Dispatcher/GraphQL.php

@@ -136,6 +136,11 @@ class _GraphQL extends Api
 				}
 			}
 
+			if( !$query )
+			{
+				$this->_respond( json_encode( array( 'errors' => array( array( 'message' => 'NO_QUERY' ) ) ), JSON_PRETTY_PRINT ), 400 );
+			}
+
 			$output = \IPS\Api\GraphQL::execute( $query, $variables );
 
 			\IPS\Member::loggedIn()->language()->parseOutputForDisplay( $output );