My version of Adept was 2.1.2ubuntu18. However, now I upgraded to Adept 2.1.2ubuntu21 using apt-get, and the problem went away.
-- adept crashes at startup after an execution of apt-get upgrade https://launchpad.net/bugs/88928 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
