Modular Page Validation After submit not working

#1

I have a modular page Ceevee. The validation check isn’t working fully. When I submit a form with blank fields, I get a pop error saying ‘Please fill out the field’. Which is great.

I have added a validation check in the textarea. No links are permitted. If the user inputs a link, the form redirected to the homepage with no errors. To the user, he/she thinks the form was submitted successfully. How do I setup the form to output an error message saying 'No links allowed."?