Your system information

• Steam client version (build number or date): latest as of 1st August 2019
• Distribution (e.g. Ubuntu): Solus
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: No

Please describe your issue in as much detail as possible:

$ steam
Running Steam on solus 4.0 64-bit
STEAM_RUNTIME is disabled by the user
Installing breakpad exception handler for appid(steam)/version(1563411792)
Installing breakpad exception handler for appid(steam)/version(1563411792)
Installing breakpad exception handler for appid(steam)/version(1563411792)
Failed to load steamui.so - dlerror(): /home/szm/.local/share/Steam/ubuntu12_32/steamui.so: undefined symbol: SDL_RWclose
Installing breakpad exception handler for appid(steam)/version(1563411792)
Installing breakpad exception handler for appid(steam)/version(1563411792)
[2019-08-01 21:56:40] Startup - updater built Jul 18 2019 00:11:24
[2019-08-01 21:56:40] Opted in to client beta 'publicbeta' via beta file
You are in the 'publicbeta' client beta.
Looks like steam didn't shutdown cleanly, scheduling immediate update check
[2019-08-01 21:56:40] Checking for update on startup
[2019-08-01 21:56:40] Checking for available updates...
[2019-08-01 21:56:40] Downloading manifest: client-download.steampowered.com/client/steam_client_publicbeta_ubuntu12
[2019-08-01 21:56:41] Download skipped by HTTP 304 Not Modified
[2019-08-01 21:56:41] Nothing to do
[2019-08-01 21:56:41] Verifying installation...
[2019-08-01 21:56:41] Performing checksum verification of executable files
[2019-08-01 21:56:41] Verification complete
[2019-08-01 21:56:47] Shutdown

Steps for reproducing this issue:

I have no idea.

Yes, I'm aware there are closed issues with the same name.

I'll update the OS. If it won't work I'll try reinstalling Steam.