The 3 plugins causing the crash:
STL Tones - Tonality: Will Putney
Neural DSP - Archetype: Plini
Neural DSP - Fortin Cali
Each of these programs installed .vst files into Library>Audio>Plugins>VST and .vst3 files into Library>Audio>Plugins>VST3.
In Performer settings, I’ve specified my VST2 folder as Library>Audio>Plugins>VST. I have both boxes (VST2 Path and Activate VST3) checked.
When I have all of my .vst files in the VST folder, but I remove the 3 aforementioned .vst3 files out of the VST3 folder, Performer opens normally and locates all plugins except for the 3 offenders (again, .vst files are in VST folder, .vst3 files removed from VST3 folder).
As soon as I place any of these 3 .vst3 files back into the VST3 folder and try to reopen Performer, it crashes (“vstconnectperformer quit unexpectedly”).
Truly, there are 2 issues with these plugins: Performer is not finding the .vst files, and Performer is crashing when .vst3 files are present.