The error message in the server log is:
java.io.IOException: C:\Program Files\AimmsPRO 2.0\AimmsPROLibrary\vc141\x64 doesn't exist.
What could be wrong?
Best answer by User Support
Sometimes this can happen if you published an app on AIMMS version using VS2017 and you are using PRO version less than 2.28.
In PRO versions later then 2.28 (October 2018) this problem is solved.
So, the easiest fix is to upgrade to a newer version of PRO.
If you can't upgrade for some reason, there is a work-around:
-Stop the PRO services
-Start the PRO services