No audio waveforms displayed on premiere pro

Hi,

No audio waveforms displayed on premiere pro.

Things I tried:

- Enabling auto waveform generation on preferences.

- Unlinking audio from video and regenerating waveform from clip menu and right click context menu.

- Reseting to saved layout and switch back and forth to different workspaces.

- Deleting audio peak files and all cache completely.

What can I do?

The file is 5.1 channel audio.

Thanks.