Every world no matter what is white i think it might me a problem with the textures since i have two files on my desktop "stitched_terrain" and "stitched_items" (Bot Gamemodes, All Worlds)
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Put those 2 PNG files to %appdata%, not to .minecraft, just to %appdata%, this should solve the problem, apparently it has something to do with user's permission of writing files to the %appdata% directory
I did that, but sadly it did not work

Duplicate of MC-6764. Please check before posting in the future.