the " Profile Upload" tab is also not working in default 2016 theme in your setup :
http://prntscr.com/bdeu15
WPLMS globally has same code for its all 10000+ customers and none of the user has ever reported same issue .
Theme relies on Buddypress for the profile picture and this is purely a buddypress module.
this is clearly not a theme issue .
This is a site specific issue .
We already tried our best to check the reason behind this .
Only Buddypress devs can help you now on this
If you want to get this issue resolved then please switch to default 2016 and then please ask for Buddypress plguin support to get tis resolved on 2016 theme .
If it works on 2016 then it will surely began to work on wplms .