P.S. Updating the plugin does not fix the issue.
Disabling all other plugins does not fix the issue.
I’m experiencing the exact same problem:
I set up a page, add the Mail Poet unsubscribe shortcode, save and refresh, and the shortcoade renders as the shortcode, not as a functioning link.
I’m using Thrive Architect.
I’ve submitted a help ticket and was advised to turn off all plugins, load the Twenty-twenty theme, set up a new page and posted the unsubscribe shortocode to that.
Done that and I get exactly the same result: the shortcode renders on the page as is, NOT as a functioning, working link through which an email subscriber could unsubscribe.
I’m using the premium version of Mail Poet.
Not happy with this, not happy at all.
It’s annoying and makes me wonder why I dropped Mailchimp.
Mailpoet: get your act together.
A glitch of this nature sullies the whole product and does nothing to build your brand. Your customers deserve better … that’s why they turned to you in the first place.