Hello everyone,
on a friend's system running the actual Kubuntu Bionic LTE release, the Discover window won't open anymore, although Discover has been started and the process plasma-discover is running. Reinstalling Discover did not change anything. On the other hand, the Moun Package Manager works fine as well as updating/upgrading using apt-get via the terminal. Could this be a kwin isssue? Thanks for any hint.

Same issue for me, I'm on KDE Neon, discover won't open, says there are updates.