World Copying Bug

Hi,

Today I Tried To Copy My World For Save My Loot. But When I Tried , There Is A Notification Appeared On The Top , and It Says "Failed To Create A Copy Of Your World" Can It A Version Problem? Because Im Using 1.16.20 but the Lastest Version Of Minecraft Is 1.16.40 I Think. Or Can It Be A Limit of Copying? I Have 12GB Free Space so It Isnt A Storage Problem Have A Nice Day! (Please Help My Problem) : )

Your Player.