### Godot version

4.0.2

### System information

Windows 10

### Issue description

EDIT: this was fixed by removing the offending files listed with the MRP and then dragging them back in from my desktop after opening the project~

I was developing my game then suddenly this started happening. I can no longer playtest my game.
I am not 100% sure what caused this but I believe at the time I was making a new inherited scene, saved it, then moved some scenes in the FileSystem tab?

![image](https://user-images.githubusercontent.com/75141902/235264827-62419c7d-963b-4002-9452-a6493a9bfe25.png)


### Steps to reproduce

No idea aaa- x-x

### Minimal reproduction project

Since I have no idea what caused it here's my early project :'D
https://drive.google.com/file/d/14JFZ420AelUNjBIth78msHY29rNjB55_/view?usp=share_link

I was working on these when the error occurred:
- Slot_0.tcsn
- Slot_Clickable.tscn
- Slot_Orphan.tscn
- Slot_Orphan.gd

case GDScriptTokenizer::Token::NOT:
		case GDScriptTokenizer::Token::BANG:
			operation->operation = UnaryOpNode::OP_LOGIC_NOT;
			operation->variant_op = Variant::OP_NOT;
			operation->operand = parse_precedence(PREC_LOGIC_NOT, false);
			if (operation->operand == nullptr) {
				push_error(vformat(R"(Expected expression after "%s" operator.)", op_type == GDScriptTokenizer::Token::NOT ? "not" : "!"));
			}
			break;
		default:
			complete_extents(operation);
			return nullptr; 
	}
	complete_extents(operation);
	return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_binary_not_in_operator(ExpressionNode *p_previous_operand, bool p_can_assign) {
	
	UnaryOpNode *operation = alloc_node<UnaryOpNode>();
	reset_extents(operation, p_previous_operand);
	update_extents(operation);
	consume(GDScriptTokenizer::Token::IN, R"(Expected "in" after "not" in content-test operator.)");
	ExpressionNode *in_operation = parse_binary_operator(p_previous_operand, p_can_assign);
	operation->operation = UnaryOpNode::OP_LOGIC_NOT;
	operation->variant_op = Variant::OP_NOT;
	operation->operand = in_operation;
	complete_extents(operation);
	return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_binary_operator(ExpressionNode *p_previous_operand, bool p_can_assign) {