Validation failed due to an incorrect data type.

swagger.json

@@ -1891,7 +1891,7 @@
                 "default": "*"
               },
               "Access-Control-Allow-Credentials": {
-                "type": "boolean",
+                "type": "string",
                 "description": "If authorization is implemented by the back-end it needs to be set to `true`",
                 "default": "true"
               }