The code
The error when saving

I’m very new to Apps Script, and I keep getting different errors with little to no details on what the error is. Most of the time, I’m able to figure them out, but I don’t even have a clue where to start with this error. The documentation isn’t much help, since it very specifically excludes all the context surrounding where I’m supposed to use OAuthScope. Google’s documentation

I honestly don’t even know what oauthScopes really does, I’m just trying to use the function getWidth() on a range of spreadsheet cells, and I think that this is what I need to do so I can, but Apps Script refuses to make that easy.