Try to change doctrine/orm version.

Author: GothShoot

composer.json

@@ -10,7 +10,7 @@
         "enqueue/enqueue": "^0.10",
         "enqueue/null": "^0.10",
         "queue-interop/queue-interop": "^0.8",
-        "doctrine/orm": "~2.7.4",
+        "doctrine/orm": "~2.7.4 | ^2.8",
         "doctrine/dbal": "^2.12"
     },
     "require-dev": {