Error message is displayed while trying to unregister from the registered challenges.

[Jobee1]

When unregistering from the registered challenges, error message "ERROR: Failed to unregister for the challenge!" is displayed.

Attached video/screenshot for the refrence:

failed_to_unregister.zip

[SathyaJayabal]

Also happens when you try to register to a challenge. These two issues happen sometimes.