Halion Sonic SE 3 "some audio files are missing, please check installation"

I have a license for Halion Sonic SE 3 pro/hybrid/artist and such, and I also have a separate free soft license for Halion Sonic SE 3 basic.

I used to be able to open the Halion standalone app without my USB e-licenser and I would only be able to play the basic set, which was great for when I’m out and about and don’t have my e-licenser.

However, now, when I launch the standalone app I get the missing audio error. None of the presets make any sound, even though it only loads the basic set. If I restart Halion with my e-licenser plugged in, it finds everything perfectly fine.

Any idea how to fix this? Thanks.