so I recently just bought discord rewards and I went to download this, I followed the instructions and went to upload the .dll into the managed folder when it says "Oxide.Ext.Discord.dll: Access is denied." I don't know what to do I tried putting it into a win.rar folder then unzipping it inside but it doesn't work, if it helps I host my server using trugaming, if there is a known solution, please let me know!

You'd need to contact your host.