1- Make sure the avatar isn't larger than 1Mb like many people said before ( If you don't know how to check that just hover over the pic you want to use and the size will appear.
2- If you met the requirements click on the pic
3- if you still got an error then log out of your account then log back in
4- Repeat step 3 it should work now
5- Make a post and if the picture didn't appear in the forum but appears on the top right ( look at the pic below)

then do the following.
1- go to your browser settings
2- click on history
3- click "clear browsing data and highlight all the options you get ( cookies, cache, browsing history etc.)
then refrsh your forum and make a post and see if it worked.
This post was last edited by Suzuken at 2016-7-18 03:31