I need help for clear my doubts. i make a webapp table where users just fill his input data and then press the save button. Once he press the save button then the data will move to google sheets. But unfortunately it not happens. Please help me to overcome from this issue.

I have tried by using .getElementById method by naming individual input box with separate ID.

Also tried by using .getElementById(with table ID) and rows and columns methods.

Example: let label=document.getElementById(“Master”).rows[0].columns[1].value;

[Attached sheet where all coding is there.]

(https://docs.google.com/spreadsheets/d/18Xb21JHSajc3a1i5nFBzNiDsOcfpzfZaHtL8R_pToz0/edit?gid=1132250307#gid=1132250307)

Thank you so much for supporting me.