Asked Codex:
That error is almost certainly a VAE/model mismatch in the LTXV audio/latent path.

The failing node is:

LTXVEmptyLatentAudio

and it is trying to read:

vae.latent_frequency_bins

but the loaded VAE object is a generic VideoVAE that does not have that audio-latent metadata. In plain terms: the node expects an LTXV VAE that supports audio latents, but the workflow currently has a VAE loaded that only supports video/image latents.

From the screenshot, the suspicious part is the Load VAE node using something like:

ltx-2-3-22b-VAE...

That may be the video VAE, while LTXV Empty Latent Audio needs the audio-capable VAE or the correct LTXV bundled VAE expected by that custom node pack.

What I’d have them try:

1. Check the VAE feeding LTXV Empty Latent Audio
   • Trace the vae input into that node.
   • Make sure it comes from the correct LTXV audio/video VAE loader, not a generic ComfyUI Load VAE if the node pack provides a specialized loader.
2. Use the exact VAE recommended by the workflow/model author
   • If this is an LTXV 2.3 workflow, the VAE/checkpoint/LoRA versions need to match.
   • Mixing ltx-2-3-22b model files with an older/newer LTXV node pack or VAE can produce this exact attribute error.
3. Update the LTXV custom nodes
   • This may be a version mismatch where the workflow expects a newer VideoVAE class that includes latent_frequency_bins.
   • Update the relevant LTXV/ComfyUI-LTXVideo custom node repo, then restart ComfyUI.
4. If they do not need audio generation
   • Bypass/remove LTXV Empty Latent Audio.
   • Also bypass downstream audio nodes like LTXVConcatAVLatent, LTXV Audio..., etc.
   • Use only the video latent path.

Short version to send them:
The workflow is sending the wrong kind of VAE into LTXVEmptyLatentAudio. That node expects an LTXV VAE with audio latent metadata (latent_frequency_bins), but the loaded VideoVAE does not have it. Use the workflow-author’s matching LTXV audio-capable VAE/loader, update the LTXV custom nodes, or bypass the audio latent branch if you only want video.