After upgrade to 18.04, several applications don't open anymore. Synapctic, SweetHome3d, the game 0ad, etc. Trying to launch it via terminal, 0ad, I got this:
dbus[2283]: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed in file ../../../dbus/dbus-message.c line 1362.
This is normally a bug in some application using the D-Bus library.
D-Bus not built with -rdynamic so unable to print a backtrace
Aborted (core dumped)
What should I do?
Steam gaming bug
You appear to be affected by this bug reported on Github:
which has been closed as a duplicate of this bug:
and summarized in this bug:
You should read all bug reports from top to bottom but to summarize a couple of solutions.
Work-around from first link
Work-around from second link
Related bug you may or may not encounter
In the future you may also find yourself affected by this gaming bug: D-Bus bug in 18.04 i386 SDL: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed
If so click on the link and subscribe to the bug. The more people reporting being affected by the bug the sooner it will be fixed.
In the meantime there are work-arounds posted by other users you can try.