https://bugs.kde.org/show_bug.cgi?id=403058
--- Comment #1 from Erik Quaeghebeur <k...@equaeghe.nospammail.net> --- I did an update of Qt from 5.11.1 to 5.11.3 yesterday, and it seems this may have something to do with it. Namely, I observed the following on the konsole where I tried to start akonadi after it crashed: org.kde.pim.akonadicontrol: ProcessControl: Application "akonadiserver" stopped unexpectedly ( "Process crashed" ) org.kde.pim.akonadicontrol: Application 'akonadiserver' crashed! 1 restarts left. Cannot mix incompatible Qt library (version 0x50b01) with this library (version 0x50b03) KCrash: Application 'akonadiserver' crashing... KCrash: Attempting to start /usr/lib64/libexec/drkonqi from kdeinit sock_file=/run/user/1000/kdeinit5__0 -- You are receiving this mail because: You are the assignee for the bug.