I wanna upload my own custom skin, but going in skinrestorer like the /skin upload command said and uploading my skin, copying the command the site gives me and pasting it into the srver it results in "this link was not approved by the administrator" and nothing else works. what do I do? I use...

I've been trying to get my custom skin on the server by uploading it on different skin websites and pasting the skin URL using /skin url <skinurl> command but it keeps showing that the domain is not allowed by the administrator. Pls send help 🙃.