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Andrew ChabotAndrew Chabot 

Trailhead: unable to install package for challenges

I am unable to install packages needed to complete challenges.  Concierge replied: "Unfortunately, Techforce does not admin or maintain Trailhead or Trailhead training orgs. Please reach out to trailhead support stated below"

Please let me know what to do.
Thanks! 
-Andy

Error message:

This app can't be installed.
There are problems that prevent this package from being installed.
Insufficient PrivilegesYou do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary.
 
NagendraNagendra (Salesforce Developers) 
Hi Andrew,

Assuming that you are trying to install package from trailhead in order to complete a module.As you are unable to install them may I suggest you  please double check with the system administrator permissions which should probably resolve the issue. Still, if the issue persists please raise a case with trailhead support team which will be your best option where you can get a quick fix of the issue.

You may reach trailhead support here. Hope the information helps.

Please mark this as solved if it's resolved.

Regards,
Nagendra.