Got an error while using diagnostic software for my car

I purchased a diagnostic software (DAS) for my car.
The installation went well but when I tried using it, I got this error message.

System error(s)
Fault(1.17) – 7.870
Serious fault! Please contact the Star
DiagnosisCall Center.
I tried searching for a resolution in the internet first, but it seemed that the error pointed to the multiplexer I bought separately.
Anyway, can you tell me a workaround solution for this?
I don’t want to purchase another multiplexer nor pay a fee to unlock it.
Thanks in advance.
