I think the issue with Komplete Kontrol finally got fixed with the latest 1.1.1838 version of Synchron Player. Komplete Kontrol 2.30 has not been updated since January, so it looks like the fix came from Vienna's side.

Synchron Pianos 1.1.1413 still causes the problem, but hopefully that will also get updated soon?

The same issue also affects Adobe Premiere and DaVinci Resolve, although at least you can blacklist the plugins once the scan is finished. No such luck in Komplete Kontrol.

Still not fixed in Komplete Kontrol 2.3.0. Will this ever get addressed?

Having to click through 8 error dialog boxes and wait 10 seconds between each one just for Vienna Synchron Pianos and Player EVERY single time I launch Komplete Kontrol is driving me mad!