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Vinh Phan 20Vinh Phan 20 

Encountering error code in Trailhead MZDBJIKC

Hello senior,
I'm encountering error code MZDBJIKC when I try to "Check challenge". Does this mean I have to create a new trailhead playground and start-over my progress?
Soundar Rajan PonpandiSoundar Rajan Ponpandi
HI Vinh,

Create a new playground.

Please mark this one as a best answer, if it's resolved your queries.

Vinh Phan 20Vinh Phan 20
Is there any way to move progress from the existing playground to a new one?
Soundar Rajan PonpandiSoundar Rajan Ponpandi
No, You can directly create it from the dropdown.
AbhishekAbhishek (Salesforce Developers) 

There is an appropriate team who can help you with this issue as we do not have access to this error code that you have mentioned here.

I would request you to reach out to the trailhead support here (

I hope you find the above information is helpful. If it does, please mark as Best Answer to help others too.

Salesforce Support