Issue with Android Fully Managed Enrollment – Invalid Token & Registration Failure

Question 1: I previously created an enrollment profile for Android in Fully Managed mode. After some time, I tried to enroll a device using the QR code, but encountered an "Invalid Token" error. I suspect (though I’m not certain) that this may have been caused by my earlier attempt to create a new profile with the same name.

Now, I’ve created a new enrollment profile (also Fully Managed for Android), but when I try to register a device, I receive the following error: "Something went wrong."

I have two questions:

How can I fix the "Invalid Token" error?  – Is it possible to recreate an enrollment profile using the same token as before?

What might cause the device registration to fail?  – How can I troubleshoot and resolve the "Something went wrong" error during enrollment?