Unable to save download. haw us.lang minecraft

I can apply the default skins with no problems but saving my custom skins causes a problem. Minecraft worlds do not save. About a week ago, my worlds stopped saving when I exit on single player. ... Windows 10 and Windows 8 or Microsoft Security Essentials on Windows 7. ... my friend (on Xbox) received the 1.16.100 update which I hadn't, so I ... ................
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