I use the i3 window manager on my Linux machine. When I attempt to start Minecraft 1.15.2, the launcher tells me "Game crashed", followed by the generic "An unexpected issue occurred"-message.

I am not able to find any crash reports in my ~/.minecraft directory.

I am also unfortunately not able to attach launcher_log.txt ("Jira could not attach the file as there was a missing token. Please try attaching the file again." — I have tried again multiple times), so I'll have to resort to Pastebin: https://pastebin.com/raw/FxZRteqe

Note that the game starts perfectly fine when I run the launcher under GNOME. I would love to debug this myself, especially considering how few users share my software preferences, but the complete absence of useful crash reports or logs makes that rather difficult.