PC [HELP] Problem with the Museum

[Raven]

I have a problem with the museum, I play from the version prior to 1.5 and I could not complete the museum, I updated the game to 1.5.4 and in this version I managed to complete the museum but when completing it they did not give me the achievement or the reward of starfruit, is there a way to fix this problem?

 

[Ereo]

I think you're missing one. You should have 7 free spaces, but you have 8.

You can either upload you file to the check up and see which one you're missing, or compare to the picture on the wiki.

 

[nicodeux]

I believe that the Dinosaur Egg is the missing one.