I CANNOT UPLOAD MY WORLD TO A REALM

HIRE A REALM PLUS OF 10 PLAYERS AND I CANNOT LOAD MY WORLD, WHEN ENTERING THE OPTION TO LOAD THE BUILT WORLD

I ENTER THE OPTION OF LOADING THE WORLD AND IT IS EXPORTED CORRECTLY, BUT BY PAZING INITIALIZING LOAD IT CRASHES AND DISPLAYS A MESSAGE OF "AN ERROR OCCURRED"

WHEN ENTERING THE REALM AND WANTING TO PLAY MY GAME LOADS MY SEED BUT IT DOESN'T LOAD ALL MY ADVANCE CLEARLY I ENTER AND IT IS MY WORLD WITH NOTHING

I JUST PAYED 1 MONTH FOR 10 PLAYERS AND MY MONEY IS SEEMING WASTE

I WAIT AT LEAST A REFUND BECAUSE I HAVE NOT USED IT