Cannot access shared folder on CasaOS

I am using file shares for 2 1 Mac and one Win 11 Laptop which works fine. Want to repolace the Win 11 Laptop with a new one but from this one I cannot access Shares on CasaOS

I have enabled unsecure guest access but trying to mount the share in explorer I get a message
that a “extended error” has occured.

How can I troubleshoot this ?

If you are using the name of the host, use the IP address instead. Also, make sure you install all the SMB protocol versions from Windows features.

Thank you goultron, just found the solution myself. Redmont added some changes wo Win 11 24H2, see
here: