Why do I get"attempt to index field ?(a nil value)"Whenever this script runs?

Whenever I run this script, it doesn't work. It gives me an error of

attempt to index field ? (a nil value)

Here is the script that doesn't work:

local v = game.Workspace:GetChildren()

for i =1, #v do
if v[v].Name ~= "REPLACE WITH THIS" then
v.KeycardDoor.ScriptedComponents["Door1"].RemoteOpen:InvokeServer()

end
end

Why does it not work? I don't understand.

Originally, I tried for i,v in pairs, but that didn't work. It didn't get every part of workspace, and I was trying to make it so it opens every model in workspace with that same name. But it didn't work. It didn't open every part of workspace like I wanted, only a few of them.

Other script that didn't work the way I wanted too.

for i,v in pairs(game.Workspace:GetChildren()) do
if v.Name == "REPLACE WITH THIS" then
if v:FindFirstChild("KeycardDoor") then
v.KeycardDoor.ScriptedComponents["Door1"].RemoteOpen:InvokeServer()
end
end
end