https://bugs.winehq.org/show_bug.cgi?id=52782
Bug ID: 52782 Summary: Anno 1800 cannot connect to multiplayer Product: Wine Version: 7.5 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs@winehq.org Reporter: winehq@greaka.de Distribution: ---
This is an incredibly frustrating bug that exists since an unknown specific version of the game. The multiplayer doesn't work. Upon trying to enter a lobby, you will face an error window titled "LR05". This bug exists since a few years by now and there is no known workaround.
Sadly, I do not know how to debug this or how to produce any logs for this as you need to run Ubisoft connect as a launcher and all I get is logs from there.