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Mounika AllenkiMounika Allenki 

Please help me with this anyone:

User-added image
Hi Mounika,

Do you have a specific issue with this particular challenge?

A URL has been provided to access and install the unmanaged package, in the Trailhead Module itself.

Mounika AllenkiMounika Allenki
I installed the package but have some issues regarding the ' create maintenance request' part
Mounika AllenkiMounika Allenki
it says this error now
Can you post the code for your MaintenanceRequest trigger and MaintenanceRequestHelper APEX class, so that we can take a look at it?