Wix Studio Basic Forms

Question:
What is considered a “basic” form, of which 4 are allowed in non-upgraded sites? I am using a template and none of my submissions are being captured.

Product:
Wix Studio

What are you trying to achieve:
a proven email capture via contact form to validate prior to upgrading plan.

What have you already tried:
Multiple inputs via desktop and mobile

Additional information:
[Include any other pertinent details or information that might be helpful for people to know when trying to answer your question.]