Lutris can't use Proton anymore

Support
21

I was wondering why UMU stopped working on Lutris v0.5.17 (which mine is installed as a “.deb” file) recently and that was the problem.

while I did mine through the file manager it has the same effect as what you mentioned from terminal as once I made that “umu_run.py” executable it now seems to work as expected once again.

because something must have gotten a bit out of whack as not long ago it was fine. so I assume when they updated to v1.1.3 is when the issue started as it was not executable(?).

22

Newer version does not allow proton to work, got this issue and i can’t fix it with the same command

Started initial process 68879 from gamemoderun /home/michel/.local/share/lutris/runtime/umu/umu-run /home/michel/Games/epic-games-store/drive_c/Program Files (x86)/Epic Games/Launcher/Portal/Binaries/Win32/EpicGamesLauncher.exe -opengl -SkipBuildPatchPrereq
Start monitoring process.
env: ‘/home/michel/.local/share/lutris/runtime/umu/umu-run’: Access denied
Monitored process exited.
Initial process has exited (return code: 32256)
All processes have quit
Exit with return code 32256

23

Fixed it, removed the entire lutris folder in /home/michel/.local/share/

24

were you able to fix it? I’m having the exact same problem:

Started initial process 131 from gamemoderun /home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/umu/umu-run /home/deck/Games/KILL KNIGHT/Build.exe
Start monitoring process.
gamemodeauto: 
[umu.__main__:79] e[35me[1mDEBUGe[0m: PROTON_VERB-bak=waitforexitandrun
[umu.__main__:79] e[35me[1mDEBUGe[0m: SHELL=/bin/sh
[umu.__main__:79] e[35me[1mDEBUGe[0m: SESSION_MANAGER=local/steamdeck:@/tmp/.ICE-unix/12805,unix/steamdeck:/tmp/.ICE-unix/12805
[umu.__main__:79] e[35me[1mDEBUGe[0m: __EGL_EXTERNAL_PLATFORM_CONFIG_DIRS=/etc/egl/egl_external_platform.d:/usr/lib/x86_64-linux-gnu/GL/egl/egl_external_platform.d:/usr/share/egl/egl_external_platform.d
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_CONFIG_DIRS=/app/etc/xdg:/etc/xdg
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
[umu.__main__:79] e[35me[1mDEBUGe[0m: GTK_IM_MODULE=ibus
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_DATA_HOME=/home/deck/.var/app/net.lutris.Lutris/data
[umu.__main__:79] e[35me[1mDEBUGe[0m: __GL_SHADER_DISK_CACHE_PATH=/home/deck/Games/kill-knight-pfx
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_CONFIG_HOME=/home/deck/.var/app/net.lutris.Lutris/config
[umu.__main__:79] e[35me[1mDEBUGe[0m: MEMORY_PRESSURE_WRITE=c29tZSAyMDAwMDAgMjAwMDAwMAA=
[umu.__main__:79] e[35me[1mDEBUGe[0m: LIBVA_DRIVER_NAME=radeonsi
[umu.__main__:79] e[35me[1mDEBUGe[0m: DESKTOP_SESSION=plasma-steamos-oneshot
[umu.__main__:79] e[35me[1mDEBUGe[0m: GTK_RC_FILES=/etc/gtk/gtkrc:/home/deck/.gtkrc:/home/deck/.config/gtkrc
[umu.__main__:79] e[35me[1mDEBUGe[0m: FLATPAK_ID=net.lutris.Lutris
[umu.__main__:79] e[35me[1mDEBUGe[0m: XCURSOR_SIZE=24
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINE_MONO_CACHE_DIR=/home/deck/.var/app/net.lutris.Lutris/data/lutris/runners/wine/Proton - Experimental/mono
[umu.__main__:79] e[35me[1mDEBUGe[0m: EDITOR=vim
[umu.__main__:79] e[35me[1mDEBUGe[0m: GTK_MODULES=canberra-gtk-module
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SEAT=seat0
[umu.__main__:79] e[35me[1mDEBUGe[0m: PWD=/home/deck/Games/KILL KNIGHT
[umu.__main__:79] e[35me[1mDEBUGe[0m: ALSA_CONFIG_PATH=/usr/share/alsa/alsa-flatpak.conf
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SESSION_DESKTOP=KDE (One-Time Launch)
[umu.__main__:79] e[35me[1mDEBUGe[0m: LOGNAME=deck
[umu.__main__:79] e[35me[1mDEBUGe[0m: GAME_DIRECTORY=/home/deck/Games/kill-knight-pfx
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SESSION_TYPE=x11
[umu.__main__:79] e[35me[1mDEBUGe[0m: SYSTEMD_EXEC_PID=12839
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINEESYNC=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: XAUTHORITY=/run/flatpak/Xauthority
[umu.__main__:79] e[35me[1mDEBUGe[0m: DESKTOP_STARTUP_ID=steamdeck;1736459677;331212;12839_TIME1908430
[umu.__main__:79] e[35me[1mDEBUGe[0m: LUTRIS_GAME_UUID=9a812bb6-0fee-421d-92cf-bdb00dd1b6f9
[umu.__main__:79] e[35me[1mDEBUGe[0m: container=flatpak
[umu.__main__:79] e[35me[1mDEBUGe[0m: MOTD_SHOWN=pam
[umu.__main__:79] e[35me[1mDEBUGe[0m: GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/deck/.gtkrc-2.0:/home/deck/.config/gtkrc-2.0
[umu.__main__:79] e[35me[1mDEBUGe[0m: GI_TYPELIB_PATH=/app/lib/girepository-1.0
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINEARCH=win64
[umu.__main__:79] e[35me[1mDEBUGe[0m: HOME=/home/deck
[umu.__main__:79] e[35me[1mDEBUGe[0m: LANG=en_US.UTF-8
[umu.__main__:79] e[35me[1mDEBUGe[0m: STORE=none
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINEPREFIX=/home/deck/Games/kill-knight-pfx
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_CURRENT_DESKTOP=KDE
[umu.__main__:79] e[35me[1mDEBUGe[0m: MEMORY_PRESSURE_WATCH=/sys/fs/cgroup/user.slice/user-1000.slice/user@1000.service/session.slice/plasma-plasmashell.service/memory.pressure
[umu.__main__:79] e[35me[1mDEBUGe[0m: DXVK_LOG_LEVEL=debug
[umu.__main__:79] e[35me[1mDEBUGe[0m: WEBKIT_DISABLE_DMABUF_RENDERER=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: AT_SPI_BUS_ADDRESS=unix:path=/run/flatpak/at-spi-bus
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
[umu.__main__:79] e[35me[1mDEBUGe[0m: PULSE_CLIENTCONFIG=/run/flatpak/pulse/config
[umu.__main__:79] e[35me[1mDEBUGe[0m: INVOCATION_ID=0d25420d158e4f7381a40096f094be03
[umu.__main__:79] e[35me[1mDEBUGe[0m: MANAGERPID=937
[umu.__main__:79] e[35me[1mDEBUGe[0m: DXVK_ENABLE_NVAPI=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: PROTON_VERB=run
[umu.__main__:79] e[35me[1mDEBUGe[0m: QT_QPA_PLATFORM=xcb
[umu.__main__:79] e[35me[1mDEBUGe[0m: KDE_SESSION_UID=1000
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_CACHE_HOME=/home/deck/.var/app/net.lutris.Lutris/cache
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINEDLLOVERRIDES=d3d10core,d3d11,d3d12,d3d12core,d3d8,d3d9,d3dcompiler_33,d3dcompiler_34,d3dcompiler_35,d3dcompiler_36,d3dcompiler_37,d3dcompiler_38,d3dcompiler_39,d3dcompiler_40,d3dcompiler_41,d3dcompiler_42,d3dcompiler_43,d3dcompiler_46,d3dcompiler_47,d3dx10,d3dx10_33,d3dx10_34,d3dx10_35,d3dx10_36,d3dx10_37,d3dx10_38,d3dx10_39,d3dx10_40,d3dx10_41,d3dx10_42,d3dx10_43,d3dx11_42,d3dx11_43,d3dx9_24,d3dx9_25,d3dx9_26,d3dx9_27,d3dx9_28,d3dx9_29,d3dx9_30,d3dx9_31,d3dx9_32,d3dx9_33,d3dx9_34,d3dx9_35,d3dx9_36,d3dx9_37,d3dx9_38,d3dx9_39,d3dx9_40,d3dx9_41,d3dx9_42,d3dx9_43,dxgi,nvapi,nvapi64,nvofapi64=n;winemenubuilder=
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SESSION_CLASS=user
[umu.__main__:79] e[35me[1mDEBUGe[0m: __GL_SHADER_DISK_CACHE=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: PROTON_EAC_RUNTIME=/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/eac_runtime
[umu.__main__:79] e[35me[1mDEBUGe[0m: APPIMAGE_EXTRACT_AND_RUN=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: USER=deck
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINE_LARGE_ADDRESS_AWARE=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: DRACUT_NO_XATTR=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: KDE_SESSION_VERSION=5
[umu.__main__:79] e[35me[1mDEBUGe[0m: GAME_NAME=KILL KNIGHT
[umu.__main__:79] e[35me[1mDEBUGe[0m: DISPLAY=:0
[umu.__main__:79] e[35me[1mDEBUGe[0m: SHLVL=0
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINE_GECKO_CACHE_DIR=/home/deck/.var/app/net.lutris.Lutris/data/lutris/runners/wine/Proton - Experimental/gecko
[umu.__main__:79] e[35me[1mDEBUGe[0m: MOZ_ENABLE_WAYLAND=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: FLATPAK_SANDBOX_DIR=/home/deck/.var/app/net.lutris.Lutris/sandbox
[umu.__main__:79] e[35me[1mDEBUGe[0m: MOZ_USE_XINPUT2=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: QT_IM_MODULE=ibus
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_VTNR=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_SESSION_ID=7
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINEDEBUG=-all
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_STATE_HOME=/home/deck/.var/app/net.lutris.Lutris/.local/state
[umu.__main__:79] e[35me[1mDEBUGe[0m: LD_LIBRARY_PATH=/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental/files/lib:/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental/files/lib64:/usr/lib/x86_64-linux-gnu:/app/lib/i386-linux-gnu:/app/lib:/app/lib32:/usr/lib/x86_64-linux-gnu/GL/default/lib:/app/lib/i386-linux-gnu/GL/default/lib:/app/lib/ffmpeg/.:/app/lib32/ffmpeg/.:/usr/lib/x86_64-linux-gnu/openh264/extra:/lib:/lib64:/usr/lib:/usr/lib64:/lib/i386-linux-gnu:/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/Ubuntu-18.04-i686:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/lib/i386-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/lib:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/usr/lib/i386-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/usr/lib:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/Ubuntu-18.04-x86_64:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/lib/x86_64-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/lib:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/usr/lib/x86_64-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/usr/lib:/usr/lib/extensions/vulkan/gamescope/lib
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_RUNTIME_DIR=/run/user/1000
[umu.__main__:79] e[35me[1mDEBUGe[0m: DEBUGINFOD_URLS=https://debuginfod.archlinux.org
[umu.__main__:79] e[35me[1mDEBUGe[0m: DBUS_SYSTEM_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket
[umu.__main__:79] e[35me[1mDEBUGe[0m: GST_PLUGIN_SYSTEM_PATH=/app/lib32/gstreamer-1.0:/app/lib/gstreamer-1.0:/usr/lib/i386-linux-gnu/gstreamer-1.0:/usr/lib/x86_64-linux-gnu/gstreamer-1.0
[umu.__main__:79] e[35me[1mDEBUGe[0m: LC_ALL=
[umu.__main__:79] e[35me[1mDEBUGe[0m: QT_AUTO_SCREEN_SCALE_FACTOR=0
[umu.__main__:79] e[35me[1mDEBUGe[0m: JOURNAL_STREAM=8:152629
[umu.__main__:79] e[35me[1mDEBUGe[0m: XCURSOR_THEME=breeze_cursors
[umu.__main__:79] e[35me[1mDEBUGe[0m: XDG_DATA_DIRS=/app/share:/usr/lib/extensions/vulkan/share:/usr/share:/usr/share/runtime/share:/run/host/user-share:/run/host/share:/usr/lib/pressure-vessel/overrides/share
[umu.__main__:79] e[35me[1mDEBUGe[0m: KDE_FULL_SESSION=true
[umu.__main__:79] e[35me[1mDEBUGe[0m: PROTONPATH=/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental
[umu.__main__:79] e[35me[1mDEBUGe[0m: PATH=/app/bin:/usr/bin:/app/utils/bin:/usr/lib/extensions/vulkan/MangoHud/bin/:/app/jre/bin/:/usr/lib/extensions/vulkan/gamescope/bin
[umu.__main__:79] e[35me[1mDEBUGe[0m: PYTHONUSERBASE=/var/data/python
[umu.__main__:79] e[35me[1mDEBUGe[0m: DBUS_SESSION_BUS_ADDRESS=unix:path=/run/flatpak/bus
[umu.__main__:79] e[35me[1mDEBUGe[0m: KDE_APPLICATIONS_AS_SCOPE=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINE=/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine
[umu.__main__:79] e[35me[1mDEBUGe[0m: ALSA_CONFIG_DIR=/usr/share/alsa
[umu.__main__:79] e[35me[1mDEBUGe[0m: MAIL=/var/spool/mail/deck
[umu.__main__:79] e[35me[1mDEBUGe[0m: UMU_LOG=debug
[umu.__main__:79] e[35me[1mDEBUGe[0m: PULSE_SERVER=unix:/run/flatpak/pulse/native
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINEFSYNC=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: DXVK_NVAPIHACK=0
[umu.__main__:79] e[35me[1mDEBUGe[0m: WINE_FULLSCREEN_FSR=1
[umu.__main__:79] e[35me[1mDEBUGe[0m: PROTON_BATTLEYE_RUNTIME=/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/battleye_runtime
[umu.__main__:79] e[35me[1mDEBUGe[0m: GAMEID=umu-default
[umu.__main__:79] e[35me[1mDEBUGe[0m: LD_PRELOAD=libgamemodeauto.so.0
[umu.umu_run:752] e[34me[1mINFOe[0m: umu-launcher version 1.1.4 (3.11.11 (main, Nov 10 2011, 15:00:00) [GCC 13.2.0])
[umu.umu_run:758] e[35me[1mDEBUGe[0m: Connecting to '1.1.1.1'...
[umu.umu_runtime:294] e[35me[1mDEBUGe[0m: Root: /home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/umu/umu-run/umu
[umu.umu_runtime:295] e[35me[1mDEBUGe[0m: Local: /home/deck/.var/app/net.lutris.Lutris/data/umu
[umu.umu_runtime:340] e[35me[1mDEBUGe[0m: Existing install detected
[umu.umu_runtime:341] e[35me[1mDEBUGe[0m: Using container runtime 'steamrt3' aka 'sniper'
[umu.umu_runtime:342] e[35me[1mDEBUGe[0m: Checking updates for 'steamrt3'...
[umu.umu_runtime:392] e[35me[1mDEBUGe[0m: Sending request to 'repo.steampowered.com/steamrt-images-sniper/snapshots/latest-container-runtime-public-beta/SteamLinuxRuntime_sniper.VERSIONS.txt?version=nh-Cz2tWqP6ims0NFfEtZQ' for 'VERSIONS.txt'...
[umu.umu_run:833] e[35me[1mDEBUGe[0m: WINEPREFIX=/home/deck/Games/kill-knight-pfx
[umu.umu_run:833] e[35me[1mDEBUGe[0m: GAMEID=umu-default
[umu.umu_run:833] e[35me[1mDEBUGe[0m: PROTON_CRASH_REPORT_DIR=/tmp/umu_crashreports
[umu.umu_run:833] e[35me[1mDEBUGe[0m: PROTONPATH=/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_APP_ID=default
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_TOOL_PATHS=/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental:/home/deck/.var/app/net.lutris.Lutris/data/umu
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_LIBRARY_PATHS=/home/deck
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_MOUNTS=/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental:/home/deck/.var/app/net.lutris.Lutris/data/umu
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_INSTALL_PATH=/home/deck/Games/KILL KNIGHT
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_CLIENT_INSTALL_PATH=
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_DATA_PATH=/home/deck/Games/kill-knight-pfx
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_COMPAT_SHADER_PATH=/home/deck/Games/kill-knight-pfx/shadercache
[umu.umu_run:833] e[35me[1mDEBUGe[0m: FONTCONFIG_PATH=
[umu.umu_run:833] e[35me[1mDEBUGe[0m: EXE=/home/deck/Games/KILL KNIGHT/Build.exe
[umu.umu_run:833] e[35me[1mDEBUGe[0m: SteamAppId=default
[umu.umu_run:833] e[35me[1mDEBUGe[0m: SteamGameId=default
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STEAM_RUNTIME_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu:/usr/lib/extensions/vulkan/gamescope/lib:/usr/lib64:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/Ubuntu-18.04-i686:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/usr/lib/i386-linux-gnu:/lib/i386-linux-gnu:/lib64:/app/lib/i386-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/lib/i386-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/lib/x86_64-linux-gnu:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/usr/lib:/app/lib32/ffmpeg:/app/lib/i386-linux-gnu/GL/default/lib:/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental/files/lib64:/app/lib32/ffmpeg/.:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/Ubuntu-18.04-x86_64:/app/lib32:/usr/lib:/usr/lib/i386-linux-gnu:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu/openh264/extra:/app/lib:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/usr/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu/GL/default/lib:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/amd64/lib:/home/deck/Games/KILL KNIGHT:/app/lib/ffmpeg:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/lib:/app/lib/ffmpeg/.:/lib:/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental/files/lib:/home/deck/.var/app/net.lutris.Lutris/data/lutris/runtime/steam/i386/usr/lib
[umu.umu_run:833] e[35me[1mDEBUGe[0m: STORE=none
[umu.umu_run:833] e[35me[1mDEBUGe[0m: PROTON_VERB=run
[umu.umu_run:833] e[35me[1mDEBUGe[0m: UMU_ID=umu-default
[umu.umu_run:833] e[35me[1mDEBUGe[0m: UMU_ZENITY=
[umu.umu_run:833] e[35me[1mDEBUGe[0m: UMU_NO_RUNTIME=
[umu.umu_run:833] e[35me[1mDEBUGe[0m: UMU_RUNTIME_UPDATE=
[umu.umu_run:833] e[35me[1mDEBUGe[0m: UMU_NO_PROTON=
[umu.umu_run:833] e[35me[1mDEBUGe[0m: WINEDEBUG=-all
[umu.umu_run:833] e[35me[1mDEBUGe[0m: DXVK_LOG_LEVEL=debug
[umu.umu_run:833] e[35me[1mDEBUGe[0m: VKD3D_DEBUG=fixme
[umu.umu_runtime:405] e[34me[1mINFOe[0m: steamrt3 is up to date
[umu.umu_run:855] e[35me[1mDEBUGe[0m: (PosixPath('/home/deck/.var/app/net.lutris.Lutris/data/umu/umu'), '--verb', 'run', '--', PosixPath('/home/deck/.var/app/net.lutris.Lutris/data/umu/umu-shim'), PosixPath('/home/deck/.local/share/Steam/steamapps/common/Proton - Experimental/proton'), 'run', '/home/deck/Games/KILL KNIGHT/Build.exe')
[umu.umu_run:695] e[35me[1mDEBUGe[0m: prctl exited with status: 0
steam-runtime-launch-client[135]: E: Unable to convert /app fd 16 into path: different file inside and outside sandbox
[umu.umu_run:699] e[35me[1mDEBUGe[0m: Child 135 exited with wait status: 125
Monitored process exited.
Initial process has exited (return code: 32000)
All processes have quit
Exit with return code 32000
26

Credit for this suggestion goes to montoya#7866 on discord for this solution.
Download and install ProtonUp-Qt
Open the app and download the latest wine ge build and use it in Lutris.