Hello @DenisBY, please copy your system information from steam (Steam -> Help -> System Information) and put it in a gist, then include a link to the gist in this issue report.

Craft The World stopped running on proton.

Issue transferred from https://github.com/ValveSoftware/steam-for-linux/issues/7406.
@Stepan-Zigmur posted on 2020-10-16T02:19:07:

Your system information

• Steam client version (build number or date): Oct 12 2020.
• Distribution (e.g. Ubuntu): ROSA Desktop Fresh R11.1 release 2016.1 for x86_64
• Opted into Steam client beta?: [Yes/No] beta and no beta
• Have you checked for system updates?: [Yes/No] yes

Please describe your issue in as much detail as possible:

Oct 08-09 2020, I was setting up a cs:go game for my friend, and since it didn't run on his computer initially, I started trying it on my computer. Changed versions of proton and in the end, only reinstalling the system on Ubuntu helped on his computer. But the game "Craft The World" stopped running on my computer" I deleted the game itself, reinstalled Steam, changed the versions of proton forcibly, but the game only loaded the black screen and crashed. If you can somehow reproduce the logging, I could lay out the logs of the game launch.
In the Steam client that runs through Playonlinux Wine, the game continues to work normally, but there are slowdowns.

Steps for reproducing this issue:

Hello @Stepan-Zigmur, please add PROTON_LOG=1 %command% to the game's launch options and attach the generated $HOME/steam-$APPID.log to this issue report as a file. (Proton logs compress well if needed.) Also, please copy your system information from Steam (Steam -> Help -> System Information) and put it in a gist, then include a link to the gist in this issue report.

This looks like a line of interest from the log: err:steamclient:create_win_interface Don't recognize interface name: SteamUtils010

Please retest with Proton 5.13.