### 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

result += '\n';
					}
					r_state = DOC_LINE_IN_CODEBLOCK;
					buffer_start = from;
				}
			} break;
			case DOC_LINE_IN_CODE: {
				int pos = line.find("[/code]", from);
				if (pos < 0) {
					process = false;
					break;
				}
				from = pos + 7;
				r_state = DOC_LINE_NORMAL;
			} break;
			case DOC_LINE_IN_CODEBLOCK: {
				int pos = line.find("[/codeblock]", from);
				if (pos < 0) {
					process = false;
					break;
				}
				from = pos + 12;
				if (pos == 0) {
					line_join = "\n";
				} else {
					result += line.substr(buffer_start, pos - buffer_start) + '\n';
				}
				result += "[/codeblock]";
				if (from < len) {
					result += '\n';