I found the answer from an earlier post:
1. Create a scene with at least one puppet
2. Import your audio into that scene
3. Select a puppet track
4. Object>Compute Lip Sync from Scene Audio
I figured it out, recording the movement separately.
If you're able to reproduce the std::exception error, can you create a new topic for it? We might've fixed that already for the upcoming Preview 2, but want to be sure. Thanks.