I have a problem with installing Ubuntu 18.04 LTS on my DELL XPS 15 9560 (though I haven't tried installing it on different hardware and thus am not sure if the bug is hardware or version specific).
After finishing all the steps in the installer the window just closes after a short pause, displaying the "waiting" cursor. Few moments after I get a crash report from plugininstall.py:
Shortly after that, ubiquity itself crashes. Can anybody suggest a workaround for this error?