Okay so there’s not a problem with the way you set up or synced your Google Sheet.
The next steps would be to debug to figure out exactly where the problem is occurring. It could be how you’re setting the variable value for the row id (try a math block to set it to an integer instead) or an invalid property name (such as a column called “Answer1 “ with a space after it).
You can use my method of debugging if you like: Debugging in Thunkable X (Video)