USB Dac error Topping e30ii

Hello everyone, I just want to ask what could be the problem, I installed the dac topping e30ii and volume it, I set it to be my head and when I play music, it says the following like the one in the picture, and the second picture is what the system is. I use a 6 amp USB charger for power. I attached a raspberry external hdd to it and that dac, and I also have an 11.9 inch monitor attached to the raspberry. That maybe it’s not a weak current and that’s why it’s causing a problem.

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