Unable to cast value to object?

I'm trying to get the text from a textbox, and tp all invited players to a private server But when I try to get the player, and I get this error: Unable to cast value to object

--Local script in a textbutton
script.Parent.MouseButton1Click:Connect(function()
	local pl = script.Parent.Parent.TextBox1.Text
	local plr = game.Players:GetPlayerFromCharacter(pl)
	game.ReplicatedStorage.ownerp4:FireServer(plr)
end)

--Script in workspace
game.ReplicatedStorage.ownerp4.OnServerEvent:Connect(function(n, plr)
print(plr)
local TS = game:GetService("TeleportService")
code = TS:ReserveServer(2097256710)
TS:TeleportToPlaceInstance(2097256710, code,{plr})
end)

I get my name in the console, but I don't get teleported to the server

Okay, so I changed it to:

script.Parent.MouseButton1Click:Connect(function()
	if script.Parent.Parent.Parent.global.Value == 1 then
	local pl = "SharkOfGod"
	local plr1 = game.Workspace:FindFirstChild(pl)
	local plr = game.Players:GetPlayerFromCharacter(plr1)
	print(plr1)
	print(plr)
	game.ReplicatedStorage.ownerp4:FireServer(plr1)
end
end)

But plr is still an object, and if I use

script.Parent.MouseButton1Click:Connect(function()
	if script.Parent.Parent.Parent.global.Value == 1 then
	local pl = "SharkOfGod"
	local plr1 = game.Players:FindFirstChild(pl)
	local plr = game.Players:GetPlayerFromCharacter(plr1)
	print(plr1)
	print(plr)
	game.ReplicatedStorage.ownerp4:FireServer(plr1)
end
end)

"plr" is nil EDIT: So I used plr1 and changed the server script a bit, and it worked!