An audio Unit plug-in reported a problem which might cause the system to become unstable

Hi,

I installed a bunch of plugins (I started a course on mixing&mastering) from different sources (Youlean Loudness, MvMeter2, Ozone11EQ, ...) and my GarageBand started to stay (even when playing or recording) a message like "An audio Unit plug-in reported a problem which might cause the system to become unstable" (I took this from a problem reported about Logic, my message is very similar and in Italian...).

I tried to remove ALL the plugins (by hand, since there's a **** way to do automatically) and I just reinstalled:

• MvMeter2
• OzoneEQ
• Youlean Loudness

and the problem is stil there.

Is very annoyoing.

I tried to keep just one of the three, one by one: I have to problem anyhow (maybe, seems, is not clear, less frequently).

I'm quite sure that I had MvMeter2 and Youlean Loudness for months before this bunch of installations and the problem was not there...

Do you know what I can do? There's a log (on the Console.app I do not see anything) where I can see WHICH plugin created the problem?

Please do not say to re-install the Operative System: this is not a solution, this the "did you try to switch off and on again" of the IT-crowd show...

Thanks,

Matteo