Can't make new Soundsets?

I can’t seem to make new Soundsets in my campaign sets. Hitting the + by Soundsets to make a new one doesn’t seem to work: no Untitled soundset shows to edit. I tried it in my custom campaign set and also in other ones. I have tried on both my computers; I have tried logging in and logging out, and also restarting both computers.

It does appear to be working in the main SoundSet list but I’m looking to collect all my custom soundsets in one place for my Crooked Moon campaign. To note, it worked earlier in the day on Friday but then later that same evening, when we went to start session, the SoundSet I had made previously wouldn’t show and I couldn’t make new ones.