Can't get this simple Custom Papyrus Script to Run

[Lumpen1]

Hey everybody, I'm trying to get this simple papyrus script to run, it is attached to a door:

 

Scriptname MyPlugin:PluginCaller extends ObjectReference

Event OnOpen(ObjectReference akActionRef)

if (akActionRef == Game.GetPlayer())

Debug.MessageBox("Hello, Player!");

else

Debug.MessageBox("Hello, World!");

endIf

EndEvent

But for some reason the it doesnt work. I get these logs:

[10/02/2021 - 11:09:11PM] Cannot open store for class "MyPlugin:PluginCaller", missing file?

[10/02/2021 - 11:09:11PM] error: Unable to bind script MyPlugin:PluginCaller to (0D001732) because their base types do not match

[10/02/2021 - 11:09:11PM] error: Unable to bind script MyPlugin:PluginCaller to (001E7DA3) because their base types do not match

[ThePersyn]

The script name should only be the actual name of the script (PluginCaller.psc) and it cannot include a colon.