Try to change your scope
variable to the following:
scope = ['https://spreadsheets.google.com/feeds',
'https://www.googleapis.com/auth/drive']
Make sure Drive API is enabled in API console.
gspread has been upgraded and it’s now based on API v4. It’s faster but it requires updates in scope.
Here’s the same issue: https://github.com/burnash/gspread/issues/512