Use left join for affected judgings since they might not exist.

(cherry picked from commit 7c169ae)

Author: nickygerritsen

webapp/src/Controller/Jury/InternalErrorController.php

@@ -153,7 +153,7 @@ public function handleAction(Request $request, ?Profiler $profiler, int $errorId
         /** @var InternalError $internalError */
         $internalError = $this->em->createQueryBuilder()
             ->from(InternalError::class, 'e')
-            ->join('e.affectedJudgings', 'j')
+            ->leftJoin('e.affectedJudgings', 'j')
             ->join('j.submission', 's')
             ->join('j.contest', 'c')
             ->join('s.team', 't')