### Godot version

ef025711a

### System information

ArchLinux x11

### Issue description

Accessing a scene unique node like this:
```gdscript
class_name Class extends Node
static func get_label() -> Label:
	return %label
```
and then accessing that class later:
```gdscript
func _ready() -> void:
	Main.get_label().text = "hello world"
```
causes a strange error when in the editor, and a normal error when run directly.
![image](https://user-images.githubusercontent.com/70787919/229785642-6aad4e31-6bd9-4eb5-bee4-7445b48a99bb.png)
```c++
ERROR: Node not found: "%label" (relative to "/root/main").
   at: get_node (scene/main/node.cpp:1364)
```
Instead of returning null.
As opposed to when using `get_node`:
```

SCRIPT ERROR: Cannot call method 'get_node' on a null value.
          at: get_label (res://main.gd:5)
SCRIPT ERROR: Invalid set index 'text' (on base: 'Nil') with value of type 'String'.
          at: _ready (res://control.gd:4)
```

### Steps to reproduce

Run mrp or follow outlined steps

### Minimal reproduction project

[bug.zip](https://github.com/godotengine/godot/files/11148287/bug.zip)

if (valid) {
				p_subscript->is_constant = true;
				p_subscript->reduced_value = value;
				result_type = type_from_variant(value, p_subscript);
			}
		} else if (base_type.is_variant() || !base_type.is_hard_type()) {
			valid = !base_type.is_pseudo_type || p_can_be_pseudo_type;
			result_type.kind = GDScriptParser::DataType::VARIANT;
			if (base_type.is_variant() && base_type.is_hard_type() && base_type.is_meta_type && base_type.is_pseudo_type) {
				
				String enum_name;
				if (p_subscript->base->type == GDScriptParser::Node::IDENTIFIER) {
					enum_name = String(static_cast<GDScriptParser::IdentifierNode *>(p_subscript->base)->name) + ENUM_SEPARATOR + String(p_subscript->attribute->name);
				}
				if (CoreConstants::is_global_enum(enum_name)) {
					result_type = make_global_enum_type(enum_name, StringName());
				} else {
					valid = false;
					mark_node_unsafe(p_subscript);
				}
			} else {
				mark_node_unsafe(p_subscript);
			}
		} else {
			reduce_identifier_from_base(p_subscript->attribute, &base_type);
			GDScriptParser::DataType attr_type = p_subscript->attribute->get_datatype();
			if (attr_type.is_set()) {
				valid = !attr_type.is_pseudo_type || p_can_be_pseudo_type;
				result_type = attr_type;
				p_subscript->is_constant = p_subscript->attribute->is_constant;