Hello,
Here is what I can see on your site – https://prnt.sc/cd3ExeI-OC-L Please documentation of Contact form 7 plugin – https://contactform7.com/faq/after-submitting-the-form-i-get-an-error-message/ https://contactform7.com/faq/i-get-an-error-message-with-a-red-border-so-how-can-i-solve-this/
If this doesn’t help, contact their support – https://contactform7.com/support/
Regards