I have started discussion here: https://answers.launchpad.net/ubuntu/+question/670844 about this issue on 12th July 2018, but haven't received any solution yet. Still awaiting a fix...
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1781163 Title: okular has lost all functions on menus (not clickable) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/okular/+bug/1781163/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs