Let's take a step back and focus on the error message. Please take a screen shot of C:\Program Files\ANSYS Inc\v222\ansys\bin\winx64 where the lsdyna executables are (or should be, starts with the letter L) and paste that here. Sounds like possibly a incomplete installation.
p.s. the ls-dyna solver uses the settings from the Detail of the Analysis Settings and not the Solve Process Settings.