2d/role_playing_game broken on godot v4.0

[lilac-eclipse]

Which demo project is affected:
2d/role_playing_game

OS/device including version:
Windows 11

Issue description:
Unable to run demo from latest commit on master. Errors on Game.gd include:

Line 10:Value of type "Node" cannot be assigned to a variable of type "NodePath"

Though many other errors exist throughout the project.

Screenshots of issue:

[InfiniteProductions]

In fact, the demo has not been yet converted to run with Godot 4 (for instance it use Tweens the old way).