@felipexa, @wpmudev-support9,
So far, what I found is that when the form was submitted, it returns:
{“success”:false,”data”:”Invalid email address”}
And the code on page (where it raised error) expects data to be array, it turns out to be simple string of “Invalid email address”, so, there goes the error we found. But strangely, the email I tested seems valid though.
I believe @felipexa found the same error 2 weeks ago (Don’t send form),
And per @wpmudev-support9’s suggestion, the mailing list has quite a few subscribers already.
