Visual Buidler Error when adding a paragraph

Hi,

Notice that we have a Basic Plan.

This plugin is awesome and has become indispensable for our foundation.

However, the forms are terribly ugly! Who did that?

We discovered Visual Builder Form and, frankly, it’s much better. ??

However, when we try to add a paragraph, we receive this error message:

ERROR: the form was not saved due to a meta key name conflict. A field already exists on this form with the meta key ‘paragraph-1’. Meta key names must be unique. Change the conflicting meta key and try to save again.

And boom ! Impossible to save unless you delete the paragraph just added… ????

But what the hell can we do about it? ??
Because there’s no way to change that damn “meta key ‘paragraph-1′”.

Please explain to us how to add a stupid paragraph without getting an incomprehensible error message!

Thanks!