When your site does not support using the sign up forms. You can us a link to connect to your Simple Sign Up form for the email sequence.
Simple Sign Up forms offer an link to a basic form you can share online. This link can be shared on social media or used as a link from your site's menu tabs.
To find the link to your simle form:
Select Sign Up Options From the Action button next to your sequence.
Select Simple Form
Click on the Link option
This video goes through were to find the link to your simple form.