No sure what information will be helpful here. I am including what I can find.
Jul 11 19:47:49 Tower systemd-coredump[2032]: [🡕] Process 1873 (steam) of user 1003 dumped core.
Stack trace of thread 1955:
#0 0x00000000f7f4b549 __kernel_vsyscall (linux-gate.so.1 + 0x549)
#1 0x00000000f7a894c7 n/a (libc.so.6 + 0x894c7)
#2 0x00000000f7a36717 raise (libc.so.6 + 0x36717)
#3 0x00000000f7a1e121 abort (libc.so.6 + 0x1e121)
#4 0x00000000e970a76c n/a (libudev.so.1 + 0x476c)
#5 0x00000000e9713269 udev_device_get_current_tags_list_entry (libudev.so.1 + 0xd269)
#6 0x00000000ea3c4fb5 n/a (libgudev-1.0.so.0 + 0x3fb5)
#7 0x00000000ea3c54af g_udev_client_query_by_subsystem_and_name (libgudev-1.0.so.0 + 0x44af)
#8 0x00000000e7d0a927 n/a (/home/bond/.local/share/Steam/ubuntu12_32/steam-runtime/usr/lib/i386-linux-gnu/libnm.so.0.1.0 + 0x38927)
ELF object binary architecture: Intel 80386
Jul 11 19:48:01 Tower pulseaudio[1684]: GetManagedObjects() failed: org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.bluez': timed out (service_start_timeout=25000ms)
Jul 11 19:53:22 Tower systemd-coredump[6102]: [🡕] Process 5943 (steam) of user 1003 dumped core.
Stack trace of thread 6025:
#0 0x00000000f7eed549 __kernel_vsyscall (linux-gate.so.1 + 0x549)
#1 0x00000000f7a894c7 n/a (libc.so.6 + 0x894c7)
#2 0x00000000f7a36717 raise (libc.so.6 + 0x36717)
#3 0x00000000f7a1e121 abort (libc.so.6 + 0x1e121)
#4 0x00000000ea48476c n/a (libudev.so.1 + 0x476c)
#5 0x00000000ea48d269 udev_device_get_current_tags_list_entry (libudev.so.1 + 0xd269)
#6 0x00000000eb420fb5 n/a (libgudev-1.0.so.0 + 0x3fb5)
#7 0x00000000eb4214af g_udev_client_query_by_subsystem_and_name (libgudev-1.0.so.0 + 0x44af)
#8 0x00000000e8b55927 n/a (/home/bond/.local/share/Steam/ubuntu12_32/steam-runtime/usr/lib/i386-linux-gnu/libnm.so.0.1.0 + 0x38927)
ELF object binary architecture: Intel 80386
Jul 11 20:26:18 Tower konsole[11458]: kf.xmlgui: Shortcut for action "" "Show SSH Manager" set with QAction::setShortcut()! Use KActionCollection::setDefaultShortcut(s) instead.
Jul 11 20:26:18 Tower konsole[11458]: kf.xmlgui: Shortcut for action "" "Show Quick Commands" set with QAction::setShortcut()! Use KActionCollection::setDefaultShortcut(s) instead.
Jul 11 20:33:18 Tower pulseaudio[1684]: Error opening PCM device front:1: No such file or directory
Jul 11 20:33:18 Tower pulseaudio[1684]: Error opening PCM device front:3: No such file or directory
Jul 11 20:33:18 Tower pulseaudio[1684]: Error opening PCM device hw:2: No such file or directory
Moderator edit: In the future, please use proper formatting: [HowTo] Post command output and file content as formatted text