All skins are steve and alex

All skins seem to be steve and alex on 1.10.2 and 1.11 (those are the versions I know have the bug) , It has been like this for a week now, I have tried many things, for example, changing versions and switching back, re-installing my minecraft, many things. I have googled about this and many people have this bug, but I had no luck finding a solution to fixing it. I'm not to sure about other versions because I mostly play on 1.10.2 because that is the version of most servers I play on (including my server). I googled about this but had no luck finding a solution to fixing it. Your help would be appreciated.
Thank you for taking your time to read over this.
(P.S: My user is pixsay)