Logic Pro crashes when clicking on audio FX

Hi,

Whenever I click on Audio FX Logic Pro 11 crashes without warning. No dialogue boxes nothing. It just crashes and then brings up the incomprehensible crash report (at least to me) with the option to relaunch.

I have tried in Rosetta and it crashed instantly in a brand new project not from any template and with just an audio or instrument track. The same keeps happening in Apple silicon mode. This happens 100% of the time when I click on Audio FX in the inspector or mixer in Rosetta or Apple Silicon mode.

This issue first appeared last week when I was about to bounce a project and was just going to activate a Fabfilter L2 on the master bus. Logic crashed instantly as I clicked on L2 in the Audio FX slot.

I started to remove the latest plugins I had installed but it kept crashing. So then I tried removing all 3rd party plugins (moving them to a temp folder from /Library/Audio/Plug-Ins/Components), doing a full rescan, deleting the audio cache (/Users/user/Library/Caches/AudioUnitCache/com.apple.audiounits.cache), rebooted and then adding the plugins back in batches of 20-30, all +800 of them. That took me more than a day, as I was trying to figure out if I had a rouge plugin. I was testing Logic in between each batch by starting it with just one audio or instrument track clicking on the Audio FX slot in the mixer or inspector. It worked every time, indicating that all plugins that I added to the Components folder worked as expected. I didn't get any faulty plugin reports at launch of Logic Pro apart from iZotope RX7, so I put all of the RX7 plugins in a separate "uninstalled" folder (I also have RX8 and RX10 installed). Thus I assumed RX7 was the issue and it is also fairly old.

After that, it all worked without any problems and Logic was running fine for about a day in Apple Silicon mode, until I was just about to finish a song and wanted to replace the Logic EQ that was inactive in the Audio FX slot on one track. I klicked on the little arrows next to the Logic EQ to select another plugin. In that moment Logic crashed instantly, without warning. Since then, I have not been able to click in the audio FX bucket att all, in Apple silicon or Rossetta mode, without these vilent crashes. I still don't get any errors or warnigns when starting Logic about faulty plugins.

I have no trouble adding/changing midi FX or instruments on instrument tracks.

Logic seems to be working fine apart from this issue.

Cubase Pro 13 runs without any issues at all.

I have tried to disconnect everything and run on the internal soundcard (MacBook Pro M2 Pro), rescanned all plugins and rebooted. Still the same issue. I also disabled Midi 2.0, which I saw suggested somewhere. Still the same issue.   

Has anyone here come across a similar issue and if so, how did you solve it, assuming you did?

Any ideas are very much welcome, as Logic is pretty useless to me at this stage.

I'm running Logic Pro 11.0.1 on MacBook Pro M2 Pro running Sonoma 14.3.1, with an UAD Apollo Twin X, NI Komplete Kontrol S61 Mk2 and a Dell U3219Q attached on high quality USB-C/Thunderbolt 4 cables and I get the same results in Apple Silicon and Rosetta mode.

I have plugins from:

Antares

Audiomodern

Baby Audio

Cable Guys

Native instruments

Arturia

Fabfilter

iZotope

Korg

LiquidSonics

Moog

Plugin Alliance

Plugin Boutique (Scaler 2 have had issues in the past and crashed validation, but I have completely removed the old version and replaced with a new version and I don't get any crashed valitations after that)

Softtube

Sonible

Soundtoys

Spectrasonic

Synchroarts

u-he

Universal Audio

Vlhalla

Waldorf

Waves

XLN Audio

IK Multimedia

Focusrite

Exponential Audio

Excite Audio

Heavycity

Kilohearts

Mastering the mix

Mixed in Key

oeksound

Polyverse Music

Presonus

Pulsar

Sonarworks

Xfer Records

Youlean

and more... All naturally bought and paid for licences.

/Donald