Resource pack download fail

Hello, I am writing this bug here. I have a minecraft server that needs a resourcepack to be played correctly. But, since I went on 1.15.2 (and maybe before), everytime someone tried to join the server failed the download of the resourcepack. I tried to understand what happened and:

• The server console only says that I failed the download of the resource pack (I asked my plugin to show this)

• The client game output said different interesting things :

• - First, it started with a NullPointerException : "Pack application failed: java.lang.NullPointerException, deleting file C:\Users\Arnaud\AppData\Roaming\.minecraft\server-resource-packs\ffd25be8f81b306a2e3a6bc250ad02e39bdc6d68", and : "Failed to delete file C:\Users\Arnaud\AppData\Roaming\.minecraft\server-resource-packs\ffd25be8f81b306a2e3a6bc250ad02e39bdc6d68: C:\Users\Arnaud\AppData\Roaming\.minecraft\server-resource-packs\ffd25be8f81b306a2e3a6bc250ad02e39bdc6d68"

• - Then, after changer a few times of resource pack host, I saw this : "java.io.IOException: Server returned HTTP response code: 451 for URL: https://download.mc-packs.net/pack/----.zip" (I live in France, and the link does work when I copy-paste it). Maybe it would not work only in my country, but I am not sure.

• Finally, when I took the old resourcepack without extention and put it back in server-resource---pack, it printed this : "File C:\Users\Arnaud\AppData\Roaming\.minecraft\server-resource-packs\ffd25be8f81b306a2e3a6bc250ad02e39bdc6d68 had wrong hash (expected 0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a, found df72f9869fab5430d866e5c0cd4bbfd2de4c6337". I don't think this is really useful because I already knew the downloaded file was null but I don't really know how does sha-1 work, so I put it here anyway.

So, I don't think this is a server or a host related bug because whatever website I try, it doesn't work. I hope this will be fixed really quick.

Thanks,

Phlayne