CE Error on Trials, sometimes at Map Start and hideout can’t load

Hello, I've now easily done 10-15 trials, but I can't complete them because I always get a CE error shortly before the end, right in the Sanctum. It also happens from time to time that you start maps, get a CE error when joining, you rejoin and all portals are gone. Also the hideout cannot be loaded on the console, there are 10 people in the guild and they all have the same problem.