Version 4.7.6

system/3rd_party/graphql-php/Utils/BuildClientSchema.php

@@ -489,7 +489,7 @@ class BuildClientSchema
             'name' => $directive['name'],
             'description' => $directive['description'],
             'args' => $this->buildInputValueDefMap($directive['args']),
-            'isRepeatable' => $directive['isRepeatable'],
+            'isRepeatable' => $directive['isRepeatable'] ?? false,
             'locations' => $directive['locations'],
         ]);
     }