Super Animal Royale (843380)

Compatibility Report

• Name of the game with compatibility issues: Super Animal Royale
• Steam AppID of the game: 843380

System Information

• Distro: Ubuntu 18.04.02 LTS
• GPU: NVIDIA GTX 750 TI
• Driver/LLVM version: nvidia 396.54.09
• Kernel version: 4.15.0-48-generic
• Proton version: 4.2-3

I confirm:

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

Symptoms

As of the May 3rd super skunk update the game can no longer connect to steam on startup. A message stating "This game requires you to be logged into Steam while playing. Try restarting Steam if necessary." pops up with an exit game button. The issue has an open discussion on the steam community forum here: https://steamcommunity.com/app/843380/discussions/0/1647665620928455381/

A developer commented "I'm not sure we changed anything that would specifically break Proton (not that we officially support Proton), but we did update the Steamworks .Net SDK to do some family share checks, since some free edition users were running into issues." which may help narrow the issues source. I'm including the steamworks.net version file in case it's related.

steam-843380.log
Steamworks.NET.txt

Reproduction

Always happens after games initial splash screen.

Start with the attached steam-843380.log and Steamworks.NET.txt, then review the reported startup failure after the initial splash screen. Reproduce it with Super Animal Royale on the listed Ubuntu, NVIDIA, and Proton versions; done means the game connects to Steam and reaches the game instead of showing the login error.