SUMMARY Since 5.18 provides new way to interact with widgets/panels AND removes ability to lock/unlock widgets it is basically breaking customization options for users who had locked widgets before update. Plasma 5.18 should enforce widgets unlocking if they were locked before update. STEPS TO REPRODUCE 1. Update to 5.18 2. Reboot OBSERVED RESULT Can't change panel layout, add widgets, etc EXPECTED RESULT Fully functional desktop experience SOFTWARE/OS VERSIONS KDE Plasma Version: 5.18
Confirmed, the Costumize Layout menu is inaccessible after upgrade to plasma 5.18. There is a workaround explained here https://www.youtube.com/watch?v=VMVsKEiQvO4 But this should not happened, especially on upgrade as users tend to checks their new system
*** This bug has been marked as a duplicate of bug 417424 ***