I ran into the same issue today. Tried installing version 1.16.2 and it came up with the same error. This is the last bit of the log where the error popped up.
Data data/minecraft/structures/fossil/skull_4_coal.nbt
Data data/minecraft/structures/fossil/spine_1.nbt
Data data/minecraft/structures/fossil/spine_1_coal.nbt
Data data/minecraft/structures/fossil/spine_2.nbt
Data data/minecraft/structures/fossil/spine_2_coal.nbt
Data data/minecraft/structures/fossil/spine_3.nbt
Data data/minecraft/structures/fossil/spine_3_coal.nbt
Data data/minecraft/structures/fossil/spine_4.nbt
Data data/minecraft/structures/fossil/spine_4_coal.nbt
Data data/minecraft/structures/igloo/bottom.nbt
Data data/minecraft/structures/igloo/middle.nbt
Failed to run processor: java.io.EOFException:Unexpected end of ZLIB input stream
See log for more details.