Done a mistake!
Updated to new OS (1.1.7.29) but forgot to uninstall eventsview with settings applet.
Tried to after but no luck!
Had this problem before but cannot remember how I solved it.
Now eventsview cannot install or uninstall completely.
And again Developer mode cannot be applied.
Done some pkcon refresh and update and after that Dev mode off!
tried pkcon remove-sailfishos-eventsview-control-with-settings-applet-patch with no success.