zoo gifts not going to buildings.

[ameliacatz]

Some of my gifts go to buildings I have started and some of them dont. I have The restroom building partially finished, and I have enough wiring and welcome maths and my gifts to finish it. Unfortunately, when I tap on it instead of letting me places on the building I get this message "Hooray these items can be used for building things", but I can't place them on the building after getting that message . Does anybody know how I can get my building finished? It is frustrating to have all the parts, but not be able to finish it.

Thanks in advance for any help you can provide!