Your system information

• Steam client version (build number or date): 1508273419 maybe this
• Distribution (e.g. Ubuntu): ubuntu
• Opted into Steam client beta?: [Yes/No] Not sure
• Have you checked for system updates?: [Yes/No] Yes

whenever I open steam I get this (when opening from desktop icon)
there was an error launching the application
when i run from terminal i get the following
[2017-10-23 20:59:39] Startup - updater built Oct 17 2017 13:11:11
Installing breakpad exception handler for appid(steam)/version(1508273419)
Looks like steam didn't shutdown cleanly, scheduling immediate update check
Installing breakpad exception handler for appid(steam)/version(1508273419)
[2017-10-23 20:59:39] Checking for update on startup
[2017-10-23 20:59:39] Checking for available updates...
Installing breakpad exception handler for appid(steam)/version(1508273419)
[2017-10-23 20:59:43] Download skipped by HTTP 304 Not Modified
[2017-10-23 20:59:43] Nothing to do
[2017-10-23 20:59:43] Verifying installation...
[2017-10-23 20:59:43] Performing checksum verification of executable files
[2017-10-23 20:59:43] Verification complete
Failed to load steamui.so - dlerror(): steamui.so: cannot open shared object file: No such file or directory
[2017-10-23 20:59:46] Shutdown
Installing breakpad exception handler for appid(steam)/version(1508273419)
Installing breakpad exception handler for appid(steam)/version(1508273419)

Steps for reproducing this issue:

1. New ubuntu
2. steam client And vollA !