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Nikhil Jaitly 8Nikhil Jaitly 8 

Trailhead cannot connnect to DE orgs with Enabled Custom Domains

Hi, I have been training myself with trailhead from quite some time now and have earned 13 badges.Was trying to connect to Trailhead again to complete the new modules, but getting the error message as above.

I completed one challenge successfully from a Module, but when I started the 2nd challenge it threw an error as above.

Please help.

Thanks Nikhil
 
SonamSonam (Salesforce Developers) 
Hey Nikhil,  When using Trailhead, we we recommend that you start with a fresh Developer Edition (DE) when completing  challenges since existing org configurations might conflict with changes you make for a challenge.
This is the same issue when you have a custom doamin setup in your ORG.
Please create a fresh org and continue with the challenges..All the best!

reference:
https://developer.salesforce.com/forums/?id=906F0000000AzJcIAK