I do not have Pi4 to test unfortunately, but there have been some earlier success reports.
Can you install an earlier Volumio version (like 2.779 which was reported OK), set-it up & test.
And then do an update with Volumio UI?
I do not have Pi4 to test unfortunately, but there have been some earlier success reports.
Can you install an earlier Volumio version (like 2.779 which was reported OK), set-it up & test.
And then do an update with Volumio UI?