Hello There,
Thanks for updating in! I have checked your modal popup and it seems that when you insert an invalid email or name, there will be an error display. However, a certain css code hides that error. This could come from a plugin. You could try testing for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
At certain point, you can get rid of this issue by adding the following CSS code in the X > Launch > Theme Options > Global CSS (http://prntscr.com/evui3r)
body.single .error,
body.single .notice,
body.page .error,
body.page .notice {
display: block !important;
}
Please let us know how it goes.