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

I have Logic 10.8.1 installed 1 month ago, osX Sonoma 14.4.1, MacBook Pro M2

I was using it fine for a month with a stock plugins, but the day I've installed FabFilter Pro Q-3 and Waves Harmony (demo with mutes) I started having this issue - not sure which one of two caused problem for me, but maybe it will help people here to narrow it down.

Dunno if you're still having this problem and I don't know if my workaround will apply as it was in garageband. It gave me the same prompt and I found a really rough and potentially harmful way of fixing it. As you open the file spam press the your backspace/delete button. It'll delete whatever track was selected before it gives the audio unit prompt. It'll instead prompt you with the save progress pop-up, if you didn't delete everything hitting cancel then delete right after. When all of it is deleted hit don't save and it'll close out the software. Reopen it and it shouldn't have that issue, HOWEVER; I'm not certain it'll work as smoothly as it did for me. It may just fully delete your file if not careful or by random. Try this with caution.

Dunno if you're still having this problem and I don't know if my workaround will apply as it was in garageband. It gave me the same prompt and I found a really rough and potentially harmful way of fixing it. As you open the file spam press the your backspace/delete button. It'll delete whatever track was selected before it gives the audio unit prompt. It'll instead prompt you with the save progress pop-up, if you didn't delete everything hitting cancel then delete right after. When all of it is deleted hit don't save and it'll close out the software. Reopen it and it shouldn't have that issue, HOWEVER; I'm not certain it'll work as smoothly as it did for me. It may just fully delete your file if not careful or by random. Try this with caution.

In my case, what worked to open a project that had this error was to open Logic itself, go to settings -> plug-in manager -> disable failed audio units. At this point, Logic will uncheck the problematic plugin, then save and close. Open the project again, and that's it.

I might have used Migration Tool. What problems should I expect after doing so?

Luckily, it seems to have been fixed with Sonoma 14.4.1. I don't experience these issues anymore since I updated.

Is there a log or anything to indicate which plug-in is acting up? It seems a bit weird that they don't give any indication (or that they don't know which one it is).

UPDATE: I just had it come up again after leaving and returning to Logic, but no plugin UI windows were open. Still, it does seem connected to app focus...

really? i guess it shows the failed plugins in the plugin manager?

only when the error window pops it does not. I agree that such vague notifications are the **** in music making with computer...

correct

I have the same issue... Even with the latest version 11 of Logic... If I new where to investigate to get more details and fix this issue... I will open a ticket...

I have the same problem with GarageBand.

AGREE AGREE, What is the point of an error, if you don't know what is causing the error. "Why doesn't Logic at least tell you WHICH PLUGIN is reporting the issue"

AGREE AGREE, What is the point of an error, if you don't know what is causing the error.

and again: Go to Utilities > Console.app > Crash Reports