I’m currently having an issue I never had before with the astrometric resolution tool. I imaged North American Nebula 3 nights in a row, and Siril is not able to resolve for any of the picture I took with any filter.
I made sure that initial coordinates, pixel size and focal length are correct, and my subs seems quit clean, so I don’t understand why it’s not working correctly.
No issue if I use Astrometry.net
Here is a capture of one of my stacking result: