I've fixed it now (it replaced the Navis to Gleba connection with Vulcanus to Fulgora, but I was trying to reorder Navis to Gleba to be after Nauvis to Fulgora).
Let me know if you have problems with any other mods.
Woops, I add checks to see if mods had moved stuff around unexpectedly, but it shouldn't have thrown an error if the mod added something new.
I've fixed it now.
This time I'm getting an error regarding the discharge defense remote: https://imgur.com/gavRr48
Caused by this mod, which indeed changes the order of the remote: https://mods.factorio.com/mod/coloured-tool-icons
I guess it makes sense that two mods trying to reorder the same thing wouldn't work. I can live without the extra color.
So sorry, I should've tested it with that mod, as I specifically wrote it so that it would be compatible with this one.
In particular, the planet-reorder mod was supposed to not give an error if another mod had already changed the order field to the correct value.
But I had made a typo in my Lua code...
Anyway, it's fixed no!
