Problem with SGP FITS words when using PixInsight

I have a problem in PixInsight when doing a plate solve using the ImageSolver script, in that it no longer works. I won’t pretend to understand the issue, so please take a look at the following post which explains it more.

Is it just a matter of changing key words, or is it the format of the data causing the problem?

The script author is going to make a change to allow it to work, but it seems a shame to have to re-solve an image that is already solved.