protonscr

Space Engineers - 244850 - Crash when joining server

protonclosed
ValveSoftware/Proton#9338 · opened 2025-12-27 by pvillaverde · updated 2025-12-27 · 1 comments · github
Ppvillaverde 2025-12-27 github

Compatibility Report

  • Name of the game with compatibility issues: Space Engineers
  • Steam AppID of the game: 244850

System Information

I confirm:

  • [X] that I haven't found an existing compatibility report for this game.
  • [X] that I have checked whether there are updates for my system available.

Symptoms

Two days ago I tried to play and worked fine with Experimental, but notice there was missing music and video in the main menu and I tried a guide to fix the issue using proton-ge 10.26 (and later 10.27). After that, I've been unable to join a multiplayer server or people join mine.

Every time I try to join any server or I host a game and people try to join, game freezes. Steam client crashes and then the game closes.

Reproduction

I've tried to get back to the previous working scenario a thousand times, but can't get it back to work. Here's my current reproduction steps:

1.- Deleted compatdata 244850 folder
2.- Uninstalled the game from Steam Library UI.
3.- Rebooted computer (you know, that's a good trick always)
4.- Installed Space Engineers again
5.- Checked the compatibility version (Here I have tried with Experiental, Proton 9, Proton 8, and Proton-GE versions, each time repating all the steps on this list)
6.- Started the game (takes a while the first time after reinstalling)
7.- Try to Join an official game server, loading icon begins to spin, after a few seconds or if press cancel, steam client crashes and then the game closes. Alternative, Quick start a game, save it and load it opening for a friend, the instant he joins and I see the "User connected" text in the screen, game freezes, steam crashes, game closes.

Attaching log and also the dump crash file referenced on that log file (last lines):

steam-244850.zip

assert_20251227164611_4.zip

I've already tried for hours anything I found and also opening a ticket on steam (which led me here) and asking support in Space Engineers Discord, but nothing has worked so far. One thing that had me thinking on the last try its that despite each time I delete the compatdata folder I loose saved games, When clicking Join, the history of the last servers I tried to join is still there. Maybe there's somewhere else to delete game-related files?

Kkisak-valve maintainer 2025-12-27 github

Hello @pvillaverde, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/1792#issuecomment-3694067560.

Upstream links