For some reason this message keep showing every time I open or launch my project and I already got this plugin installed in my UE4.
Notes: - My engine and the plugin are updated in the last version (4.12).
- I started this project with UE4 4.11 with the plugin.
Make sure you actually have the Plugin installed. You can easily check this by going to the Launcher > Library > Under the Engine version click Installed Plugins. If it’s got the latest version installed here you should see it in the list.
If it is listed, try removing it, and then going back to the Plugin in the Marketplace to grab another copy and see if that resolves the issue.