I did the app to help my brother in his business, and he is in a different country I’m Middle East.
The app work perfectly at first, but later any time he tried to enter data, he get message said
- " Unable to add/delete row in table >> my sheet name that he tried to enter the data !!<< google.
*App, Request. RequestError
*The caller does not have permeation 
*Errors message [The caller does not have permeation]
*Location Reason [forbidden] Domain [global]
I’m really confused of what to do pleaseeeee help