can anyone help me I'm having a problem with minecraft skins the last few days my minecraft wont display any skins not even my skin??. I'm on 1.12 version of minecraft and have tried many different ideas in how I can try to fix this.

I have deleted and re down loaded the At Launcher. that's not worked ;(

I've made and changed my skin on skin dex and that's not worked either.

I have shutdown and reopened my game with no results.

I just don't know whats wrong plz can someone help me sort this out it would really help ;)