How do i solve 'Audio Unit plug-in can't be used'? (GarageBand)

I recently got the M1 Le plugin as part of a bundle that came with a korg midi keyboard i bought, however i cannot load the plugin in garageband for some reason. I know i have it authorised as it works as a stand-alone application. I am always met with this message upon loading the plug-in in GarageBand: 'The Audio Unit 'M1 Le' could not be loaded for your project, and may need to be updated'. I fail to see why it would need updating as i got it from an up-to-date source and it runs on my Mac as an application. Can someone help me out here as it is one of the plug-ins i am looking forward to using, thanks
How do i solve 'Audio Unit plug-in can't be used'? (GarageBand)
 
 
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