I'm getting this error when trying to connect to the UPB...

DEBUG 708.281371 sec : Connecting to /dev/ttyUSB1
DEBUG 708.283575 sec : Port FD 4
DEBUG 708.283822 sec : Connection successful, attempting handshake...
DEBUG 708.283950 sec : CMD <P#>
>EBUG 708.339911 sec : RES <UPB_OK
DEBUG 708.340122 sec : Handshake failed.

I've built indilib from the latest repo. any idea what might be wrong?

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