Recently I've not been able to guide with the internal INDI guider. Program would say starting RA drift, lost star, then give the usual admonition about larger box. The internal guider had always worked before so I started asking: what has changed?
The optical train specification was the first thing that came to mind. In the secondary train, I have a Lodestar as my camera to do the guiding. What I finally realized is that, at the end of the optical train row, I have to specify the mount (CGX-L) as the guider! Once I did that it all worked again.
The instruction videos need to include these optical train descriptions.