I can't see groups

Hi everybody,

I was testing an emulator (plus based) and it work but at the beginning groups had no problem. Now (idk what I did, I'm not expert with this new version) I can't see the images anymore.

https://i.gyazo.com/288e4ab2d0c2cbe8...20fd842b70.png <- this is the problem.

I tried with folder in my cms but nothing, ideas?

Thanks