Starting yesterday, Calc is not allowing me to insert or delete rows or columns in any of my previously working spreadsheets. Either the buttons are greyed out, or when I click them I get an error reading “Protected cells can’t be modified”.
I had not turned on protection, or protected any cells in these sheets - at least not on purpose. Nothing I’ve tried related to toggling protection has worked (single sheets, all sheets in the same file, selected rows). I get this message whether the Tools > Protect sheet… is checked or not. Even on new sheets, those which I’m able to insert or delete rows with no trouble, when I open Tools > Protect sheet … and uncheck the "Protect this sheet and … " option, the OK button greys out, so I can’t save the change.
This morning I updated to 7.6.0.3, but that has not helped. These are native Calc sheets, not converted Excel sheets. I can’t discover which cells Calc considers to be protected. I’ve turned on Value Highlighting, but no cells appear to have the light grey background described in help documentation.