### Godot version

4.0 beta 12 mono

### System information

MacOS 13.1, Apple M1 Pro

### Issue description

When `text_editor/external/use_external_editor` is set to true but `text_editor/external/exec_path` is not set and I create a new script and attach it to a node Godot freezes and i need to force quit the application.
Also after a restart when double clicking on the script the application freezes but I can quit normally

### Steps to reproduce

- Set Use External Editor to true in Editor Settings and leave Exec Path empty
- Create a new project with Moblie Renderer and Git Versioning in Godot
- Create a 3D Scene
- Create a gd script in the FileSystem inspector or directly attach the script to a node

### Minimal reproduction project

[New Game Project.zip](https://github.com/godotengine/godot/files/10420510/New.Game.Project.zip)

HashMap<String, Cache>::Iterator E = cached.find(p_path);
		if (!E) {
			Cache c;
			c.cache = ResourceLoader::load(p_path);
			E = cached.insert(p_path, c);
		}
		E->value.time_loaded = OS::get_singleton()->get_ticks_msec();
		if (cached.size() > max_cache_size) {
			uint64_t older;
			HashMap<String, Cache>::Iterator O = cached.begin();
			older = O->value.time_loaded;
			HashMap<String, Cache>::Iterator I = O;
			while (I) {
				if (I->value.time_loaded < older) {
					older = I->value.time_loaded;
					O = I;
				}
				++I;
			}
			if (O != E) { 
				cached.remove(O);
			}
		}
		return E->value.cache;
	}
	virtual ~EditorScriptCodeCompletionCache() {}