Summoner's rift 5v5 map ''BUG'' Dark map

I did a repair 5 times! I unnistall the game and install it again and the bug it's still there... Its only on the Summoner's rift,every other map is fine...If you could pls tell us what we have to do or if you gonna fix it so we know cause too many people have this and i see no response. TY
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