Third party plugin missing from packaged game

I’m using the Sphinx speech recognition plugin. Copied it directly into the project folder. It works well in the editor, but when I packaged the project, it says “Plugin ‘SpeechRecognition’ failed to load because module ‘SpeechRecognition’ could not be found” when I tried to open the packaged file.

I’ve tried editing the .uproject / .uplugin / .Build.cs in every possible way, but it just won’t work and there’s no error in the log whatsoever when I packaged it or tested it.

Saw another post several years ago where someone suggested that third party plug-ins shall be installed in the Engine plugins folder instead of the project folder. Tried that, and got an error when I was packaging it.

Any suggestions?

btw this is the plugin that I’m using