Hello…Please guide me…how to use spreadsheet? I wan to get data, Delete data, set sell, update data like this… please Any one explain…

Alright found the issue. Basicalky ice deleted 2 row names. After connecting the app script. This caused that if i uploaded 1 value it would throw An error but When using 3 rows to upload it works. [blocks] It works now! Thanks for all the help!!!