hi @OleszykYt You need to be running as Administrator.
UEFN will not install correctly from Launcher on any Windows 11 (eleven) version needs to run Elevated "Run As Administrator - General / Issues and Bug Reporting - Epic Developer Community Forums
When you start UEFN you must be running via EP GL “Run as Administrator” for everything
You cannot do anything without “Run as Administrator” for everything
You may have to uninstall UEFN and install as described above