From what I’ve seen, Siege error code 4-0xfff0be25 usually shows up when the game can’t properly connect to Ubisoft servers, often because of a network issue, server downtime, or corrupted game files. I had a similar issue once, and it went away after restarting the game and my router, but you can also try verifying the game files, disabling VPNs, and making sure Ubisoft Connect is updated. If the servers are down, the only real fix is waiting until Ubisoft resolves it.