From version 1.14.60 and up to the current one: 1.16.0 I cannot download the world hosted on my Realm to do local backup, it always displays the error window before It start the download, also since version 1.16.0 I it displays error when I try to upload resources or behaviors packs, but despite the error they are uploaded and applied.

I have tried to download my world from the wifi network of my house without NAT conflicts, using 4G data and from the internet of my work with USB ethernet adapter for my mobile device and in all cases the download fails.

I also uninstalled Minecraft and even formatted my mobile device a couple of times, I also tried from another 2 mobiles and the download also failed.