I am having the same issue. mailchimp not integrating.
here’s my mailchimp embed code:
<form action=”https://XXXXXX.us5.list-manage.com/subscribe/post?u=9c632e46f2fab44ff2a95d9c5&id=ef94249bb8” method=”post” id=”mc-embedded-subscribe-form” name=”mc-embedded-subscribe-form” class=”validate” target=”_blank” novalidate>
here’s what i entered in optin revolution:
u= 9c632e46f2fab44ff2a95d9c5
Id= ef94249bb8
Action= XXXXXX.us5.list-manage.com
does this look right?