The quest for Curator Class V on campaign to get 2 stars across your museums is stuck at 1/2 even though I have all 5 museums (Space, Science, Prehistory, Supernatural & Aquatic) to 2 star

Hello,

Sorry for the confusion here, it’s the ways the objective is worded. What it actually wants you to do is get additional two stars in any location. It can even the the same location and the objective will pop.

Yeah i did do that, i had the quest before i even started the Space one, i completed the Science museum to 2 star which was the 1/2 completion of the quest beforehand :) 

You just need to get another star in a museum.