Hello there
the problem why the exeption is not working - is that the folder to the Files
C:\Program Files\WindowsApps\Microsoft.624F8B84B80_3.405.2.0_x64__8wekyb3d8bbwe\*.*
have restricted permission.
effektiv permission
System : Read, execute
Local user: read
unknown user / Microsoft Account : Read , execute
The Avast Software have no permission - to read the folder or to access/look on it.
On my system the only way to play the game, when i turn off the software for a period.
maybe the hash from the forzahorizon5.exe file can help, to bring it to a secure execption for the application.