Android Donated all minerals and artifacts but museum isn't complete

[dpatt144]

The title pretty much sums it up. I collected all the artifacts and minerals and donated all of them. They all show up in the museum itself. They're all filled in my collection tab.
However, I do not have the achievement and Gunther hasn't given me a stardrop. When I talk to him, I get the standard "you don't have anything to donate" dialogue.
Has anyone encountered this? Is there a work around?

 

[Ereo]

How many empty spaces do you have in your museum? Can you post a screenshot?

 

[imnvs]

When I talk to him, I get the standard "you don't have anything to donate" dialogue.

You'll get this if you have nothing in your inventory to donate. It doesn't mean the collection is complete.

As Ereo said, how many spaces do you have open? That'll tell us if you actually have everything.