I can't apply my world to realm

hi

I had previously applied more than 1gb of the world to realm, but it was successful then.
However, there is now an error in replacing the world that is less than 100mb.
I've tried all the methods I know, but it only showed numerous error messages, "The Internet is not good," and "There is not enough space to save the world."
I'm tired of this realm bug and just want to get as much money as I paid.
Please help me play my world in realm.