In my case I pirated VEGAS PRO 20 and the patch/crack caused this problem, I analyzed the changes it makes in the windows registry and I noticed that it changes the value of the DevOverrideEnable key, and I found that it is a key that usually causes problems with anticheats, etc.

TLDR;
Open Registry Editor (just type regedit in windows search)

Go to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options

Set DevOverrideEnable = 0 (double click and change the value)

restart PC

If you didn't find DevOverrideEnable, look here.

In my case I pirated VEGAS PRO 20 and the patch/crack caused this problem, I analyzed the changes it makes in the windows registry and I noticed that it changes the value of the DevOverrideEnable key, and I found that it is a key that usually causes problems with anticheats, etc.

TLDR;
Open Registry Editor (just type regedit in windows search)

Go to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options

Set DevOverrideEnable = 0 (double click and change the value)

restart PC

If you didn't find DevOverrideEnable, look here.