Checking against the server logs at the time, shows your client is failing to send a piece of validation data to the server, I cannot see any reason for that to be possible though (other than a really really slow connection, as there is a 4 second timeout on waiting for the data)… and your game log does show you have the correct version of the game so its not like you have some weird issue with an older client…
so my only conclusion, is you are getting a greater than 4 second latency to the server… (if you’re friends were going to the same server as you at your home, they’d get the same issues more than likely, there’s nothing here that is account/user specific other than which world you are connecting to in the sanctum).
Could you try doing a ping to 54.93.213.82 and see what sort of timings it reports just as a sanity check? (windows key, cmd, “ping 54.93.213.82”, https://iihelp.iinet.net.au/How_to_run_a_ping_test if need further instruction).
From the sanctum you can always use the right-hand warp to go to your home beacon (will cost of course though) even if the left warp fails to connect to this eu world.