Can't sync with VPP - "Internal Error Occurred"
Do you have any B2B apps in your Apple Business Manager assigned to your SOTI VPP instance? If so and you are not running 15.2 or 14.5 of the mobicontrol server then that is the issue. I had a similar issue and was able to clean out those B2B apps to resolve. However my understanding is there is a fix in both 14.5 and 15.2 for this issue.