Two things.
The error message ,
all it says, for us normal people, is that something between NX and the OS crashed. Nothing more.
GTAC can read many of the error codes ( the e06d7... etc ) but it might not tell the reason.
When you get a message like this, the NX syslog will most often tell a wider story on what it was that crashed.
The Solution center is "down" .
It has lost all the good stuff.
because of the GDPR rules in the EU (-only ?) Siemens has removed all bug reports from the solution center, because they might contain customer information.
FAQ's and SFB's are still there.
Regards,
Tomas