when i log into a minecraft server,it doesnt work and then when i try it a couple times,it works. then when i join a mini game, for example creative on desired craft, the game crashes. it happens every single time

Please attach the crash report ([minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt), otherwise we can not diagnose this issue.
For technical support please use the Mojang Support Center.

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Another Block Entity, this time it is a Furnace.

-- BlockEntity missing instance data --
Details:
	BlockState: minecraft:furnace[facing=north]
	Block coordinates: World: (-1875,65,-4232), Chunk: (at 13,4,8 in -118,-265; contains blocks -1888,0,-4240 to -1873,255,-4225), Region: (-4,-9; contains chunks -128,-288 to -97,-257, blocks -2048,0,-4608 to -1537,255,-4097)

how do i fix it?

That's what everyone's trying to figure out. If you're on 1.10.1, go on 1.10 and try again.

i went onto 1.10 and it works! thank you!

You're welcome.