Message "Download Failed" trying to download Realms file.

So, I know about the Download Limit. I know I can try three times and have to wait three days to try again.

But every time I try to download my Realms file, it rolls normally but then it gets stuck in 100% for a few minutes and the message "Download Failed" pops up for no reason. Without leaving an error ID like 6003 or 6004.

I don't know what to do and I couldn't find any other Issue where this problem was resolved.

The fact is that it appearently counts as a download. Because if I do this three times (it fails every time) I have to wait a few days to try again.