Modelsim: "Unable to replace existing ini file"

Hello,

Ever since I upgraded to the latest Quartus Pro Edition (21.2.0), the bundled Modelsim hangs when I compile a Verilog source file and prints out error messages to the console shown below. It might hang for a minute or two on a simple Verilog file with the cursor turning into a spinner.

I have tried changing the properties on the mpf file, but I haven't been able to find a fix.

# ** Error: 捁散獳椠⁳敤楮摥മ
# $
# Unable to replace existing ini file (<filename>.mpf). File can not be renamed.
# ** Error: 捁散獳椠⁳敤楮摥മ
# $
# Unable to replace existing ini file (<filename>.mpf). File can not be renamed.
# ** Error: 捁散獳椠⁳敤楮摥മ
# $
# Unable to replace existing ini file (<filename>.mpf). File can not be renamed.