I’m sorry to hear that you’re having issues connecting to the Topping from your Ropieee Bridge.
Do you happen to have a different endpoint that you can temporally connect to the Ropieee (using the same USB cable and port that you use to connect the Topping) to see if you can get playback with a different device?
This will help us establish if the issue you’re seeing is stemming from the Bridge or the Topping.
No I do not have another USB DAC device to test at this time. I do however have a HAT DAC coming for the PI. That hopefully will work with the end state AMP I am trying to drive.
My thought was that keeping the Ropieee in place but swapping out the endpoint attached to it would help us distinguish whether the cause of this issue is the Ropieee or the Topping.