Recently, I encountered a problem with KNotes --my most frequently used thing on KDE-- in which it refuses to create new note. If I click New Note on its menu, normally it pops up a new yellow box on screen I can write on it, but suddenly it shows nothing. However, simply viewing existed notes works without problem. In short, I fixed it by changing the storage folder of the notes to the one owned by KNotes. To do so, run KNotes > right-click it > Configure > Collections > pay attention to Folders tab > make sure the folder name is Notes under Notes > make sure the folder where the note will be saved pointed to Notes/Notes > OK. Now you should be able to create new note once again. Happy working!
(Correct setup so KNotes can add new note)
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