Unable to upload big worlds to realms

I am not able to upload my world that is 70MB+ big on my Windows 10 on my 2-player realm. It would show me "An Error Occured" when trying to upload the world
I tried uploading a 34.5MB Survival World, 12MB Creative World,  and all of these worlds showed me an error but 0.31MB and 0.9MB Creative World, 2.6MB Survival World was able to be uploaded.