Ah, as suspected - this is the normal Send Log or bug report link which lets you share a detailed log for debugging
The process is described better here in a step by step fashion:
https://volumio.github.io/docs/User_Manual/Sending_logs_for_troubleshooting.html
This isn’t the LiveLog - that is just a few lines further down the page. Do you not see it on the dev page?
Either way, you issues is mostly the same as I mentioned back in No Spotify Connect / Allo USBridge - Sparky - Mytek Brooklyn DAC - #2 by ashthespy - wrong mixer setup.
Can you try the steps I posted in that thread?
It should solve your issue…