Hi, yep, add the hidden field for the checkbox to the embed widget:
<input name="f_optin_exists" type="hidden" value="1" />
Make sure the webflow checkbox has same name as the checkbox in the code “f_optin”.
I hope this helps. cheers, Dave 
Hi, yep, add the hidden field for the checkbox to the embed widget:
<input name="f_optin_exists" type="hidden" value="1" />
Make sure the webflow checkbox has same name as the checkbox in the code “f_optin”.
I hope this helps. cheers, Dave