If you’re still using my “Insert and Delete Cells” Add-on for Google Sheets, you’re now seeing: “401. That’s an error”, “Error: deleted_client”, and “The OAuth client was deleted”.
I shut down the “Insert and Delete Cells” Google Sheets Add-on yesterday because the functionality has been built into Google Sheets for a few years now.
You will find the Delete functions in the Edit menu and the Insert functions in the Insert menu.
Sorry for the abrupt shut-down of the Add-on. I was trying to figure out a graceful way to remove the Add-on from the store, and instead made an irrevocable shut down choice.
I’m glad the Add-on was useful to people while it lasted!