Just Flight Hawk T1 HSI problem

Hi All,
I just bought Just Flight Hawk T1. Once I press AHRS heading sync knob my HSI turns off - flag appears on the instrument. After that it cannot be turned back on. What makes it worse is now the HSI is permanently in off state no matter what I do. Even PC restart does not work. I bought the plane in MSFS Market Place. Please kindly assist.

Thank you,
Bart