Check in the main compatibility menu before clicking Apply.
This is commonly reported after installing the game on modern systems (Windows 10/11) with high-DPI or multiple monitors, or after a fresh install when the game defaults to an unsupported resolution. Fifa Manager 14 Resolution Loop
Windows 10/11 tries to "help" legacy games by adding an overlay. This causes the loop. Check in the main compatibility menu before clicking Apply
The game is hardcoded with specific assumptions: Fifa Manager 14 Resolution Loop