I used the assistant to "move to Toronto", "set the time to tonight" (which selected 8 pm which is fine) and then "look at Polaris".

The first two worked fine, but the last resulted in me looking at nadir, where there was a yellow disk. That did not look like where the sun would be at 8 PM (!!!), so I asked it to "look at the sun" and nothing changed.

Fixed! Looking at anything: planets, stars, ra/dec, should now work correctly

There was a rather fundamental issue to do with the inconsistent calculation of az/el for headings (cameras have negative heading, and this was not being correctly accounted for, leading to errors when patches to one heading calculation broke another)

Can you give a bit more detail? Where was the camera set to? What was the time? What RA, DEC values did you use? What star (roughly should it have been pointing to?