Tutorials/Help in Godot

Ok,
so this was going to be an ask for help
but I figured out a way to do it.
so I am going to post it here so if anyone else hit's the same
problem you can try it out!
(I'll attach the pictures of the Error as well)

What should i make?

Someone could tell me what it means:

Resource file not found: res://?

Hi Godot community,

I'm using Godot 3.2 for game dev.

What do you think is simpler/more robust for controlling player movement animations in a platformer game?

There will be at least 6 possible movements and at least 3 character states (none, sword, bow).

I'm trying to make an artificial intelligence like the enemies of Hotline Miami ...