Can't upload world

I can't upload or create anything on the realm that i subscribe.

Anytime i want to make world, it will end with error.

I am feed up after trying for 4 days. Have been looking through countless forum/discussion,

but nothing help.

I reset minecraft, delete add-on (behaviour pack),

using the best internet provider in town,

restart computer.. none of them is working to solve these problem.

I have no where else to ask, but here.

If you can't help me, none can.

I really want to play the realm plus for Summer, but I can't because of this problem.

Please help me. I don't want to waste my subscription