George Karnos
Ansys Employee

Fluent and Redhawk are the only programs supported on the ARM CPU.
Please see the following post for more information.

Testing is not done on parallels.

That being said, a coupe items to check:
Rename the %APPDATA%\Ansys\v2##  to v2##.old then try to run.
Also, check your PATH
Open a DOS Command prompt and type in:

set PATH
This will display your PATH.
make sure it starts with: