The problem is caused by a Windows bug, which originates from a recent update.

Source:
https://support.microsoft.com/en-us/topic/windows-10-devices-can-t-connect-to-an-802-1x-environment-179ef277-e6ef-8ea3-cb0e-11a6b80fa955

If you copy the following text into a notepad and save it as fix.reg file name and run it, it should work after a restart:

- On Windows 10 : 

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP\13]
"TlsVersion"=dword:000000c0

- On Windows 11 :

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP\13]
"TlsVersion"=dword:00000fc0