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Ranu AgarwalRanu Agarwal 

Getting error in 'Sales Reports for Lightning Experience >Extend Reports with Dashboards and Apps' module of trailhead

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: XPJAIPNE

Please help here...
NagendraNagendra (Salesforce Developers) 
Hi Ranu,

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
Ranu Agarwal iBirdsRanu Agarwal iBirds
@Nagendra,

Still getting the same issue. I tried with new developer org and also checked that no namespace enabled here. Can you please help here to solve out this issue.

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: WTRKVOAX