Yeah, this is really weird, I hope support will find a solution. Meanwhile you may want to give a try to the following.
1- / Don't know which DAW you use but try to RESCAN your Plugins.
2-/ Go to yourmacosHDD / Library / Application Support / hold the command key while dragging the Sonic Academy folder ( or just the Kick 2 folder if you have ANA installed ) on your desktop ( to move it, not copy ).
Then use the free Permission Reset Permissions Reset for Mac - Free Download - MacUpdate.webloc
Once Permission Reset is open, drag and drop the Sonic Academy Folder ( or Kick 2 folder ) on the gui, do not change any settings but just click the Reset button on the right, confirm with pwd if asked. Close Permission Reset, move back your Sonic Academy ( or Kick 2 ) folder to YourMacHDD / Library / Application Support
Give it a new try.
3-/ If that still does not work, you could try a manual install using the unarchiver Keka.
Copy your Sonic_Academy_KICK_2_V1.05.zip in a new folder on your desktop, go in there & uncompressed the .Zip archive with Keka.
Go to the new uncompressed folder Sonic Academy KICK 2 - V1.05 and in the MAC folder to access the KICK 2 - V1.05.pkg installer. Right click on it and choose "Show Package Contents" go into the Contents folder and you should see an Archive.pax.gz archive file. Uncompressed it with Keka and it will extract a new archive named Archive.pax uncompressed this one as well with Keka. It will uncompressed a Library folder in which one you'll find an Application Support & an Audio Folders. Inside you'll have both the plugins and the Sonic Academy / Kick 2 files so you may want to try to copy those files from your desktop to the original location overwriting what's already installed. It's the same file architecture, so just have to copy/replace from this new extraction to the matching folder or file on yourMacosHDD / library
So you could copy replace the entire Sonic Academy folder from this new extraction to YourMacosHDD / Library / Application Support / or just choose to replace the Kick 2 folder especially if you have ANA installed, you only want to try to overwrite the Kick 2 folder, not the all Sonic Academy folder.
Your plugins will go in the usual locations :
Kick 2.component should be copy to yourmacosHDD / Library / Audio / Plug-Ins / Components
Kick 2.vst should be copy to yourmacosHDD / Library / Audio / Plug-Ins / VST
Kick 2.aaxplugin should be copy to yourmacosHDD / Application Support / Avid / Audio / Plug-Ins
I don't know if this will work but you might want to try, it won't arm anything anyway, just take care of replacing the correct & matching files . Also try to do reboot your Mac twice and perform a full "Repair Permission" on your entire system and then reboot again.
Those kind of "spooky" tricks that you don't understand how and why it should works have save me from weird problems in some situations, so who knows, it could work.
After that, I'm out of idea but you're in good hands with support anyway.
Best & good luck