VST appears in Reaper and Cubase, but not Ableton Live 9 on MacOS

Hi all,

I’ve made a VST that runs in the AudioPluginHost, Reaper and Cubase, but doesn’t appear in Ableton Live. If I compile an AU version that shows up fine however. I’ve already checked whether I’ve specified the correct custom plugins folder and whether it’s a 32 bit vs 64 bit problem, but both don’t seem to be the case. Could there be some kind of box I haven’t ticked or function I haven’t implemented that Ableton wants to have, but other hosts are fine with not having?

Here’s a Google Drive download link to the VST and AU, and I’ll just list all my version specs here:
MacOS 10.12.6
Ableton Live 9.7.7 64-bit
Reaper 5.965 64-bit
Cubase LE AI Elements 10.0.15

Thank you in advance for any suggestions!

Ableton Live 9 doesn’t support VST3.

Ah haha, silly how I never noticed that before, I just always assumed it did. Thank you!