If you are using a pre-relase version of the Google Sheet, replace all the scripts / code that can be found in the Apps Script folder: https://github.com/Knowit-Experience-MarTech/ga4-documentation-administration-solution/tree/main/Apps-Script just to be sure you have the latest version.

In your Google Sheet, go to Extensions -> Apps Script. Replace code.

Then go to Settings in the Sheet, and update Version to 1.0