Simple Google Sheet - writing a row

[tatiang]

What happens if you replace the UID value in the create row block with a text string (e.g. “none”)?

If that works, then you probably need to check for a null value in your stored variable:

Store variable stopping my app

Stored variables are a little tricky because they start out with a null value. So you have to do when screen opens → if stored variable = null → set stored variable to [some value]. That value can be zero (0) or an empty string ("") or any other value.