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Shiva RajendranShiva Rajendran 

Build an Instant Notification App Trailhead

I got the Following Error on the last module even when i tried with a new sfdc developer org.

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: FMZJJISKUser-added image
Best Answer chosen by Shiva Rajendran
NagendraNagendra (Salesforce Developers) 
Hi Shiva,

Sorry for this issue you are encountering.

May I request you please confirm if you are using a brand new developer org for validating the challenge?

If you are using a brand new developer org then please double check that your org doesn't have a namespace enabled.

Still, if the problem persists log out of all accounts and log in once again in a different browser by clearing the cache and cookies which should probably do the trick.

Please let us know if this helps.

Mark this as solved if it;s resolved.

Thanks,
Nagendra

All Answers

NagendraNagendra (Salesforce Developers) 
Hi Shiva,

Sorry for this issue you are encountering.

May I request you please confirm if you are using a brand new developer org for validating the challenge?

If you are using a brand new developer org then please double check that your org doesn't have a namespace enabled.

Still, if the problem persists log out of all accounts and log in once again in a different browser by clearing the cache and cookies which should probably do the trick.

Please let us know if this helps.

Mark this as solved if it;s resolved.

Thanks,
Nagendra
This was selected as the best answer
Shiva RajendranShiva Rajendran
Hello Nagendra,
Yes i used the brand new Salesforce dev org for this.
I have tried verify the trail badge from different system already
By the way , i have got the expected outcome for that badge.Dono why this error occurs.
Looking forward to see if there exists any solution to this problem. The main problem is the error contains no useful information for debugging it.

Thanks and Regards,
Shiva RV