Same issues but on .NET 4.8. Started after installing Windows 11 24H2.

Error while trying to run project: Unable to start program...
The process has been terminated.
Refresh the process list before attempting another attach.

This worked for me (Probably GUI version of user27735398's answer).

• In Solution Properties (right click on solution, select properties).
• Select Build
• Checked Prefer 32-bit.