wont let game start

"more actions" -> "attach files"

i think thats it

Duplicate of MC-13510.

what does that mean, do i need to delete something

That means this particular crash was already reported and you should vote for MC-13510.

that one said my java was out of date i reinstalled with 0 success, ièm going to loose my mind if i lost this map ive got 400 hours of building a village with 100+ villages and was about to fight a wither

See my comment there.