As of Auto-Align Post 2.3 and DaVinci Resolve Studio 19.1.1, Audio Track Layers are not supported.

We hope to enable support for Audio Layers with future releases of Auto-Align Post and Davinci Resolve Studio integration.

In the meantime, if you're using Audio Track Layers, please make sure to flatten the layers before aligning.

To flatten layers, go to the Timeline menu and click Flatten Audio Track Layers.