REALM PROBLEM

For a few days I bought a new realm for 10 users in which I am trying to upload or copy a world from one realm to another realm but it won't let me. I need help since today I bought said realm and I have these problems My Pc: CPU Ryzen 3700X GPU AMD Radeon™ RX 5700 XT RAM 32 GB SSD M.2 500 GB INTERNET: DOWNLOAD 100 MB / UPLOAD 30 MB