ANSYS is not working properly
If ANSYS is having problems with meshing, or other issues (especially after ANSYS inexplicably uninstalls itself)
Fix
You will need to Devirtualize and Revirtualize your
AutoDesk products by following the instructions in this link.
Devirtualizing And Revirtualizing AutoDesk Products
If you don't see the Cloudpaging Player Icon that's shown in the instructions, you will need to to reboot, and it will reappear.