There are few trailhead challenges where you have to use brand new developer org's to pass the challenge successfully. Please make sure you are using a brand new dev org in order to validate this challenge.
You probably get this error, because your session has expired.
Please try to log out of your DE (in trailhead, not the org) and reconnect your DE to a trailhead. Then, please re-check the challenge. It should pass now.
Still, if the problem persists can you please double check that your Developer Edition Org does not have any namespaces setup in it? Trailhead does not support namespaced DE Orgs and so if you have a namespace registered for the DE Org, you'll need to sign up for a new one and complete this module there.
Please let us know whether you are performing the challenge in trailhead playground or developer org?
Please mark this as solved if the information helps so that it gets removed from the unanswered queue which results in helping others who are encountering a similar issue.
There are few trailhead challenges where you have to use brand new developer org's to pass the challenge successfully. Please make sure you are using a brand new dev org in order to validate this challenge.
You probably get this error, because your session has expired.
Please try to log out of your DE (in trailhead, not the org) and reconnect your DE to a trailhead. Then, please re-check the challenge. It should pass now.
Still, if the problem persists can you please double check that your Developer Edition Org does not have any namespaces setup in it? Trailhead does not support namespaced DE Orgs and so if you have a namespace registered for the DE Org, you'll need to sign up for a new one and complete this module there.
Please let us know whether you are performing the challenge in trailhead playground or developer org?
For more information please refer to below link.
- https://developer.salesforce.com/forums/?id=9060G0000005QfVQAU
- https://developer.salesforce.com/forums/?id=9060G000000I1zEQAS
Hope this helps.Please mark this as solved if the information helps so that it gets removed from the unanswered queue which results in helping others who are encountering a similar issue.
Thanks,
Nagendra