Two days ago Divinity: Original Sin 2 stopped launching on my Ubuntu machine. It had been running fine for weeks. I received an update to the game, which included a new launcher, which I thought would be related, but am not sure. When booting I can hear the Lucian suction-cup sound, but down see the image animation below as I previously did.

Several seconds after that the game exits. I'm looking at the logs and am not sure what the issue could be. I see some errors that may not be related.

GameAction [AppID 435150, ActionID 2] : LaunchApp continues with user response "CreatingProcess"
Opted-in Controller Mask for AppId 435150: 0
/bin/sh\0-c\0PROTON_LOG=1 /home/stratton/.local/share/Steam/ubuntu12_32/reaper SteamLaunch AppId=435150 -- '/home/stratton/.local/share/Steam/steamapps/common/SteamLinuxRuntime_soldier'/_v2-entry-point --verb=waitforexitandrun -- '/home/stratton/.local/share/Steam/steamapps/common/Proton 6.3'/proton waitforexitandrun  '/home/stratton/.local/share/Steam/steamapps/common/Divinity Original Sin 2/bin/SupportTool.exe'\0
Game update: AppID 435150 "", ProcID 127222, IP 0.0.0.0:0
ERROR: ld.so: object '/home/stratton/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
Starting app 435150
>>> Adding process 127222 for game ID 435150
GameAction [AppID 435150, ActionID 2] : LaunchApp changed task to WaitingGameWindow with ""
ERROR: ld.so: object '/home/stratton/.local/share/Steam/ubuntu12_64/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
ERROR: ld.so: object '/home/stratton/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: ld.so: object '/home/stratton/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: ld.so: object '/home/stratton/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
pid 127227 != 127224, skipping destruction (fork without exec?)
GameAction [AppID 435150, ActionID 2] : LaunchApp changed task to Completed with ""
>>> Adding process 127223 for game ID 435150
>>> Adding process 127224 for game ID 435150
>>> Adding process 127225 for game ID 435150
>>> Adding process 127471 for game ID 435150
Proton: Error while copying to "/home/stratton/.local/share/Steam/steamapps/compatdata/435150/pfx/drive_c/windows/system32/_nvngx.dll": No such file or directory
>>> Adding process 127477 for game ID 435150

Could that missing dll be related?