the sitelong/sitelat error is due to a longstanding bug in SGP where they didn't use the right format to store the latitude and longitude of your observatory in the FITS header. PI never used to care about these keywords until juan added a bunch of astrometry code to PI, i think in 1.8.7. now that it's looking at those keywords it finds that it can't parse them and issues that error.
i believe SGP have fixed this problem in the latest versions of the problem.
rob