### Godot version

4.0 Beta10

### System information

Ubuntu 22.04 (Tuxedo OS)

### Issue description

After importing an *.obj file as a scene, if you click on the mesh in the import settings Godot crashes.

![Screenshot from 2022-12-24 14-38-23](https://user-images.githubusercontent.com/25522325/209452619-3c0ed61b-deaa-4fb6-8ff5-5aa11ff4ed33.png)

I the above screenshot, clicking in the circled area will crash Godot.

### Steps to reproduce

Import .obj file into a project.
Select the file.
Go to import setting.
Change OBJ As Mesh to Scene.
Click Reimport.
Click Save Scenes, Re-Import, and Restart.
Once restarted, open the advanced import settings on the object.
Click the are circled in the description, or in the meshes tab.

### Minimal reproduction project

N/A

Specifically, I lack the distribution rights of the .obj files I am using.  Any .obj file should do, this happened to me on at least 4 different .obj files.
if (p.is_absolute_path()) {
				path = p;
			} else {
				path = base_path.path_join(p);
			}
			Ref<Texture2D> texture = ResourceLoader::load(path);
			if (texture.is_valid()) {
				current->set_texture(StandardMaterial3D::TEXTURE_ROUGHNESS, texture);
			} else if (r_missing_deps) {
				r_missing_deps->push_back(path);
			}
		} else if (l.begins_with("map_bump ")) {
			
			ERR_FAIL_COND_V(current.is_null(), ERR_FILE_CORRUPT);
			String p = l.replace("map_bump", "").replace("\\", "/").strip_edges();
			String path = base_path.path_join(p);
			Ref<Texture2D> texture = ResourceLoader::load(path);
			if (texture.is_valid()) {
				current->set_feature(StandardMaterial3D::FEATURE_NORMAL_MAPPING, true);
				current->set_texture(StandardMaterial3D::TEXTURE_NORMAL, texture);
			} else if (r_missing_deps) {
				r_missing_deps->push_back(path);
			}
		} else if (f->eof_reached()) {
			break;
		}
	}
	return OK;
}
static Error _parse_obj(const String &p_path, List<Ref<Mesh>> &r_meshes, bool p_single_mesh, bool p_generate_tangents, bool p_optimize, Vector3 p_scale_mesh, Vector3 p_offset_mesh, List<String> *r_missing_deps) {