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Which version of AcyMailing 5 do you have?
Which version of Joomla?
Which version of PHP do you have on your server for this site?

    mihha thank you for the response.
    Joomla version, 3.10.9.
    AcyMailing Starter : 5.11.1
    Php 7.4.29

    Please provide a video of the issue, so I can see it and try to replicate on my test site

      mihha I can but there's not much to it. All you have to do is go to acymailing and try to edit or create a newsletter and that error displays. Should I try to uninstall and reinstall the program? Or perhaps install version 7?

      I also tried to go into templates to see if I can notice anything else.
      This error displays:
      Can't load the editor.

      Unable to display an editor because no editor plugin is published.

      We have several editors. Is there a setting I need to check, perhaps?

      You can set editor which AcyMailing will us in AcyMailing configuration

        mihha yes, but this did not resolve either issue. Both messages still appeared. We decided to install v7. It appears to be working without issues.