Lowspin:

If RStudio Cloud were running an older version of streamlit, would it even give the error that the form is missing a form_submit_button()?


Probably not, but I like to start at the most obvious place, especially on a system that we don’t control.
I’ve also run this locally and can confirm it works correctly. Unfortunately, I don’t have access to RStudio Cloud, so I don’t know what else to suggest.
Best,
Randy