You cannot attach a debugger while playing Project 1999.

[Korjyrin]

I found that the Windows 10 Xbox game overlay app was causing this debugger error to pop-up for me. I removed it from the system using the following powershell command and rebooted. Issue was gone.

Within powershell:
Get-AppxPackage Microsoft.XboxApp | Remove-AppxPackage

Read more about it here:
https://www.reddit.com/r/pcmasterrac...his_is_how_to/

If this was already mentioned here in thread, my apologies. Hope this helps someone =)

I really dislike when M$ installs their app-trash without asking =\

[GoneSwimming]

Removing the new game overlay worked for me. I had to reboot though after removal to get it working.