### Godot version

4.0 RC1

### System information

Linux Mint 20.3 Cinnamon

### Issue description

Tried converting a 3.5 game to 4.0 RC1. The conversion popup menu closed after a few seconds, and trying to edit the game crashes the entire engine with the following errors, which seem to be related to one music file not loading:
![errors](https://user-images.githubusercontent.com/125468288/219127087-f5a78035-4e4a-4625-aadb-e0cde6d5ac3d.png)

Not sure what's causing the issue, because when I created a new project with only that file and converted it I didn't get these errors, but consistently get them when trying to convert that game.

### Steps to reproduce

- Download the reproduction project below
- Import in Godot 4.0, and click "convert full project"
- If the bug happens, the engine will crash whenever trying to edit or run the converted project

### Minimal reproduction project

[Music Convertor Crash Demo.zip](https://github.com/godotengine/godot/files/10746591/Music.Convertor.Crash.Demo.zip)

{
			
			for (unsigned int current_index = 0; RenamesMap3To4::enum_renames[current_index][0]; current_index++) {
				enum_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::enum_renames[current_index][0] + "\\b")));
			}
			
			for (unsigned int current_index = 0; RenamesMap3To4::gdscript_function_renames[current_index][0]; current_index++) {
				gdscript_function_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::gdscript_function_renames[current_index][0] + "\\b")));
			}
			
			for (unsigned int current_index = 0; RenamesMap3To4::project_settings_renames[current_index][0]; current_index++) {
				project_settings_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::project_settings_renames[current_index][0] + "\\b")));
			}
			
			for (unsigned int current_index = 0; RenamesMap3To4::project_godot_renames[current_index][0]; current_index++) {
				project_godot_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::project_godot_renames[current_index][0] + "\\b")));