Missing fields from report screen?

Missing fields from report screen?

Hello,

I'm trying to create a report based on a form I've set up in Zoho Creator. The form has five fields, but when I try to set up a report, only one of those fields is available to drag into the report. Searching for the other four by name shows no results.

The field that's showing up is a 'single entry line' field, and so are three of the four that are missing.

Does anyone know why these other fields aren't available on the report screen, please?

Thank you!

Emma