HALion error

Hello,

If I open the empty string quartet template, I get the following HALion error:
HALion Error.png
HALion is completely installed, though. I had this problem with HALion Symphonic Orchestra before, see: https://www.steinberg.net/forums/viewtopic.php?f=126&t=99947

When clicking on “Ok” on the above error message, the audio engine crashes:
Audio Engine Crash.jpg
What could be wrong?

Have you tried running the Dorico installer again in order to give it a chance to reinstall the HALion content?

Cleaned up, reinstalled, and solved.