Green Empty Bar In The Contact Form [Motion Theme]

[userwithoutname]

Hi, I've this issue, when a contact form is submitted, a green bar with no text appears below as shown in the image:

(Richiedi Informazioni means Request Info in italian)

 I would like to put a greetings message inside but i don't know how to do it, any helps? ❤️

The website is this.

[DelightCart]

@userwithoutname I tested the contact form and I can see no issue. See attachment.

[userwithoutname]

Yes sorry, I've solved this by myself. I would like to ask if is possible trigger a js event when the form get submitted. I  don't understand where to write the js code, and coding a js observer wich search for the greeting message after submission probably isn't the best choice