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Stuart FlemingStuart Fleming 

Customize Compact Layouts unexpected error

I am working on the trailhead https://trailhead.salesforce.com/modules/salesforce1_mobile_app/units/salesforce1_mobile_app_compact_layouts

I am getting the following warning message after checking the challenge:

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: IREOKHWT

I had some problems accessing my developer org earlier, and had to disconnect it.

Given that this assignment relies on previously created objects and such, I can't just create a new Developer Edition.

Any ideas?

Thank you,

NagendraNagendra (Salesforce Developers) 
Hi Stuart,

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.If that doesn't help please give a try by restarting the batch

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.

Stuart FlemingStuart Fleming
Thank you for your help.  I have two developer orgs.  One a real dev org through my company (we are doing a test run of salesforce) and another trailhead playground created from trailhead.

The error is coming from the dev org.   This does not have a namespace.

 would use the trailhead created org, but I am unable to test that it works in my android mobile browser.  

The trailhead org url is https://resourceful-badger-119859-dev-ed.lightning.force.com/one/one.app#/home  and when I open that from my mobile browser, I get a login error.