Hello, I'm having the same kind of issue where my galaxies list is empty (the bodies list is fine though).
I've tried on a fresh game on the same KSP install and the galaxies list is working fine. I've also tried to create a new basic craft (probe core + telescope) on my current savefile but it wouldn't work either. As far as I could try to find the cause of the issue, it seems tied to my current savefile (currently orbiting telescope is called "James Kerman Space Telescope", but any new craft with a telescope would show the same behavior).
Here are links to the logfile and savefile.
That savefile went through a lot (1.2.2, 1.3.1, 1.4.5 and countless mods) so, that's not a big deal but if any report can help, here's mine. Thanks for keeping this great mod alive !