GarageBand "An error has occured with an installed Audio Unit "Hybrid_x64" by "AIR Music Technology" This plug in may require an update

I've been trying to work out how to delete a file that isn't there. I have also been looking at the recent answers and questions on this subject and I'm aware that my problem is different as I tried following the instructions and how it all about logic. I know that the plugin probably isn't compatible but it had come with my midi keyboard "The Akai MPK mini" so it was a proper software plugin.

I have even looked in the Macintosh<library<components to double check that this plugin file is gone. I don't know what else to do and I need help to be able to fix this as GarageBand will not open without updating this audio unit that isn't there.

It would be grateful if someone could tell me how to fix this.