add conditions back

src/CustomQueriesExtension.php

@@ -32,6 +32,7 @@ class CustomQueriesExtension extends SimpleExtension
         $subject = $event->getSubject();
         /** @var \Bolt\Storage\Mapping\ContentType $contentType */
         $contentType = $subject->getContentType();
+        if ($contentType){
             $fields = $contentType->getFields();
 
             $customQueryFields = [];
@@ -55,6 +56,7 @@ class CustomQueriesExtension extends SimpleExtension
                     }
                 }
             }
+        }
 
     }
     /**