https://bugs.winehq.org/show_bug.cgi?id=48138
--- Comment #12 from winehq@juke.fr --- (In reply to David Torok from comment #7)
(In reply to winehq from comment #6)
I have tried the patch from David and it seems to work for the game client. Thank you very much.
There still remains an issue with the launcher crashing when editing a rune page, should I open a separate bug to track it ?
Glad to hear that it works for you! Yes, that is a completely different issue, probably related to the newer chromium embedded framework that shipped with the client. I'll take a look :)
The latest wine-lol available on github seems to fix this issue, so either wine 4.20 helps or the custom 4.20 patch in the repo fixes it.