Here are two more notes regarding the XO6 "Unable to connect to XO server. Retry" message, which pops up after 30 seconds. It occurs when either the Chrome or the Microsoft Edge browsers are used on my Windows 11 PC. However, I often use a Samsung Tab-A9 (tablet), and it does not have this issue with XO6. It uses the Chrome browser.

@dinhngtu i've manage to fixed it. Your build adds some extra entries in /var/lib/xcp/state.db that aren't in the version from testing that brake things when i downgraded the packages. ipv4_dns VIF.ipv6_dns