You can unplug any USB storage device on ASIAIR(U disk, SSD, etc) to try again if there is one connected.
It is not the camera issue and it is software related(ASIAIR firmware and camera SDK). We are still debugging. Our devs are trying their best and this is a little tricky as expected.
One of our users has the same problem, and he reported that: Sets the exposure of the ASI120MM Mini once to 0.001s. Then again e.g. 1s. Then the problem is gone.
You can try this way. We will do some improvement in the next version.