Translating retry connection error message and fixing E2E tests

front/translations/en-US/error.en-US.json

@@ -9,6 +9,10 @@
             "title": "Connection rejected",
             "sub-title": "You cannot join the World. Try again later {{error}}.",
             "details": "If you want more information, you may contact administrator or contact us at: hello@workadventu.re"
-        }
+        },
+        "connection-retry": {
+            "unable-to-connect-to-workAdventure-are-you-connected-to-internet": "Unable to connect to WorkAdventure. Are you connected to internet?"
+        },
+        "error": "Error"
     }
-}
+}