Problems with SAML login. External browser won't open on some computers.

Hi.

As in topic. We have few computer in which when trying to connect to our VPN using SAML login w external browser the browser itself won't open. We tried reinstaling the forticlient with older versions, nevest version, adding and changing default browsers but nothing is working. FortiClient ver. 7.4.0.1658, Windows 11 24H2. Anyone have any idea what we can do to help except new system instalation?