### 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)

valid = valid && test_conversion_gdscript_builtin("is_connected(A,B,C))", "is_connected(A, Callable(B, C)))", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(tween_method(A,B,C,D,E).foo())", "(tween_method(Callable(A, B), C, D, E).foo())", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(tween_method(A,B,C,D,E,[F,G]).foo())", "(tween_method(Callable(A, B).bind(F,G), C, D, E).foo())", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(tween_callback(A,B).foo())", "(tween_callback(Callable(A, B)).foo())", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(tween_callback(A,B,[C,D]).foo())", "(tween_callback(Callable(A, B).bind(C,D)).foo())", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("func _init(", "func _init(", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("func _init(a,b,c).(d,e,f):", "func _init(a,b,c):\n\tsuper(d,e,f)", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("func _init(a,b,c).(a.b(),c.d()):", "func _init(a,b,c):\n\tsuper(a.b(),c.d())", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("func _init(p_x:int)->void:", "func _init(p_x:int)->void:", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("func _init(a: int).(d,e,f) -> void:", "func _init(a: int) -> void:\n\tsuper(d,e,f)", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("q_PackedDataContainer._iter_init(variable1)", "q_PackedDataContainer._iter_init(variable1)", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("create_from_image(aa, bb)", "create_from_image(aa) #,bb", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("q_ImageTexture.create_from_image(variable1, variable2)", "q_ImageTexture.create_from_image(variable1) #,variable2", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("set_cell_item(a, b, c, d ,e) # AA", "set_cell_item(Vector3(a, b, c), d, e) # AA", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("set_cell_item(a, b)", "set_cell_item(a, b)", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("get_cell_item_orientation(a, b,c)", "get_cell_item_orientation(Vector3i(a, b, c))", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("get_cell_item(a, b,c)", "get_cell_item(Vector3i(a, b, c))", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("map_to_world(a, b,c)", "map_to_local(Vector3i(a, b, c))", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("PackedStringArray(req_godot).join('.')", "'.'.join(PackedStringArray(req_godot))", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("=PackedStringArray(req_godot).join('.')", "='.'.join(PackedStringArray(req_godot))", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("apply_force(position, impulse)", "apply_force(impulse, position)", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("apply_impulse(position, impulse)", "apply_impulse(impulse, position)", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("draw_rect(a,b,c,d,e).abc", "draw_rect(a, b, c, d).abc# e) TODOGODOT4 Antialiasing argument is missing", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("get_focus_owner()", "get_viewport().gui_get_focus_owner()", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("button.pressed = 1", "button.button_pressed = 1", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("button.pressed=1", "button.button_pressed=1", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("button.pressed SF", "button.pressed SF", &ProjectConverter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_with_regex("AAA Color.white AF", "AAA Color.WHITE AF", &ProjectConverter3To4::rename_colors, "custom rename", reg_container);
	
	valid = valid && test_conversion_with_regex("\"device\":-1,\"scancode\":16777231,\"physical_scancode\":16777232", "\"device\":-1,\"scancode\":4194319,\"physical_scancode\":4194320", &ProjectConverter3To4::rename_input_map_scancode, "custom rename", reg_container);