Looking through the GDB lens (I haven't got the hang of kdevelop yet), running Kstars, the program gets to the function "Align::setSolverMode" with argument "1".
First the symbol "sender()" doesn't exist, so the button group doesn't get checked. Is that why the solver fields are grayed out?
Then, when "setAstrometryDevice" is called, m_RemoteParserDevice is a null pointer which triggers the "Cannot set solver to remote. The Ekos equipment profile must include the astrometry Auxiliary driver." message.
Backtrace seems to indicate that "activeProfile" has not been set properly. I haven't been able to read its contents yet.