Very confused: HTTP 400 (Bad Request) with webhook? line 27

I am trying to send report data to a webhook but get the HTTP 400 error. I do not know how to fix. Have been trying for 30 minutes

game.ReplicatedStorage.zndnsuwu.OnServerEvent:Connect(function(plr)
	local url = "https://discord.com/api/webhooks/xxxxxxxxxxxxxxxxxxxxxxx"
	local http = game:GetService("HttpService")

	local msg = {
		["embeds"] = {{
			["title"] = plr.Name.." has said",
			["description"] = plr["PlayerGui"].reportSys.situationDescribed.Value,
			["color"] = 5814783,
			["fields"] = {
					{
				["name"] = "Evidence Provided",
				["value"] = plr["PlayerGui"].reportSys.additionalEvidence.Value,
				}
			},
			["author"]  = {
				{
				["name"] = plr.Name.." has made a report against a player known as ".. plr["PlayerGui"].reportSys.playerReported.Value,
				["icon_url"] = "https://tr.rbxcdn.com/9cca3cb4828966762e5173ab300e20c8/150/150/AvatarHeadshot/Png"
				}
			},

			
		}}
	}
	local finaldata = http:JSONEncode(msg)
	http:PostAsync(url,finaldata)
end)

still need help with this