Is there a way to modify the error text showing in red?

1) Is there a way to modify the error text showing in red in this example?

Yes, you may change the text of any error or warning you have in the form by following our guide here: https://www.jotform.com/help/61-How-to-Change-Form-Warnings

I hope this helps. If you need further assistance please let us know. Thank you.