I was seeing this same warning. The only overlap of extensions with the list above and my list (I only use 3 extensions) is 'system- moni...@paradoxxx.zero.gmail.com'.
I realized I had installed that extension from source rather than through the extensions website since it needed to be built from source for a while due to prerequisites, and I hadn't updated it. I uninstalled and re-installed it from the Extensions web site. So far I haven't seen this warning come back. I'll continue to check if I see it again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. free online bettinghttps://bugs.launchpad.net/bugs/1812593 Title: gnome-shell: JS ERROR: Exception in callback for signal: activate: Error: Error invoking IBus.set_global_engine_async: Expected function for callback argument callback, got undefined To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1812593/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs