Resolving conflicts with other plugins
Third-party plugin conflicts
Resolving dependency conflicts with other plugins
If you see a message like this one below in your Dashboard or Plugins page, that's a conflict with another plugin using the same dependency as MailPoet, but probably using an older version of the same library as we use:
In order to fix that issue, you'll need to install this plugin: Plugins Load Order and then go to your WordPress Settings menu and click on Plugins Load Order page.
First, try dragging the MailPoet plugin above the conflicting plugin. This will make sure MailPoet is loaded first. Then click on Save Settings and go to the Plugins page. If that error message above isn't gone away, repeat the steps below, but this time, make sure MailPoet is dragged below the offending plugin. That might do the trick.
Conflict resolution with functions.php (advanced)
This code can be added to your theme's
functions.php or elsewhere.