Accordions by PickPlugins stopped working on our website. I was prompted to do the migration and watched your video and ran the automated migration. It began to run, then the page went to this message: Sorry, you are not allowed to access this page. The page giving this message was
https://twp.montgomery.nj.us/edit.php?post_type=accordions&page=upgrade_status I can email you the screenshot.
I tried creating the new page with the accordion shortcode, as shown in your video. This also did nothing.
I also did the update to v 2.2.12 No change.
For security reasons, we don't give our admin credentials to this municipal website. Can you still help?
I will contact our hosting company. Perhaps you have some guidance for them? Thank you!

Welcome to our forum.
Could you please send me your accordion page URL via email support@pickplugins.com
You can still downgrade to older version if you want, please download older version from here https://wordpress.org/plugins/accordions/advanced/
Regards