FYI, as of 2022/05/25, The Lord of the Rings Online made a breaking change to user installations involving the game UserPreferences*.ini file(s) if you run a 64-bit client. The symptom is that the Launcher (login) panel comes up, but once one attempts to enter a game world (which opens the game client), the launcher closes, and the game client does not start. The Lutris button transitions back from “Stop” to “Start” as it is aware the game programs died/quit.
The problem involves a broken edit of the game .ini files (failure to properly merge UserPreferences64.ini with a now-unified UserPreferences.ini).
Fixing the .ini file is relatively simple and described here:
Less obvious though, is a related problem for those that have DXVK enabled as one of the scripts posted here does:
I was able to fix the game launch in Lutris simply by disabling the “Enable DXVK/VKD3D” Runner Option in the Lutris Configure option found in the pop-up menu attached to the Play button.
The manual edits to the .ini file weren’t needed in my case, but apparently are for others. In my case, simply turning DXVK off made it so the client would start, re-prompt whether I wanted to use DX11, and when I clicked Yes, the program inserted the missing UserPreferences.ini entries needed by the 64-bit client. Nevertheless, if the edits are done, they restore the graphics configuration in use prior to the update.
No telling if they will fix what they broke, but until they do, the DVXK + ESYNC script is probably going to frustrate folk.
Disabling DVXK is needed regardless whether the .ini file is edited. Re-enabling DVXK after the games starts working again will re-break it.