I am seeing a 'Failed to load plugin: filemanager' error when trying to make an email
If you are seeing an error, when trying to edit an email template, such as
Failed to load plugin: filemanager from url http://www.yoursite.com/slpw/filemanager/plugin.min.js
then the most likely reason is that you have updated your site to use SSL but not changed the installation paths. To solve this go to Tools - Configuration - Install paths and change the URL's listed to use https://
You should always access the Sitleok dashboard using https:// if your site uses SSL.