Landing page. Form. Spam Proection. "Invalid token". What am I missing?

Hello fellow Eloquans!

Discussion title says it all.

I've set up an Eloqua WYSIWYG landing page. I built out an Eloqua form, enabled Form Spam Protection on the form, embedded the form in the landing page.

Tested live. All submissions are not processsed but flagged as spam, with an "invalid token" block reason in the spam data log. This is a plain ole lead gen landing page, not a blind submission.

What am I missing that would allow processing of submissions?

Tried a couple different addresses over half a day.

Grateful for any wisdom!!!