### Godot version

4.0 beta 10, mono edition

### System information

Windows 11

### Issue description

No matter what I do Project Camera Override can never detect a game instance.

![image](https://user-images.githubusercontent.com/13719743/209912444-541f642a-42d3-4860-a4e0-54a17dbbab0b.png)

Of relevance: I can see remote nodes. I can see the output in the console. I can see the output in my IDE of choice (Rider). I can toggle debug mode.

It's just the camera that is unable to detect the game instance.

### Steps to reproduce

This happens everywhere, including on a brand new projects where the only nodes are a 2d camera and the Godot svg icon for testing. This also seems to happen when not using Rider as a third party editor.

### Minimal reproduction project

N/A
default_texture_node_type = "Sprite2D";
	// Node2D
	texture_node_types.push_back("Sprite2D");
	texture_node_types.push_back("PointLight2D");
	texture_node_types.push_back("CPUParticles2D");
	texture_node_types.push_back("GPUParticles2D");
	texture_node_types.push_back("Polygon2D");
	texture_node_types.push_back("TouchScreenButton");
	// Control
	texture_node_types.push_back("TextureRect");
	texture_node_types.push_back("TextureButton");
	texture_node_types.push_back("NinePatchRect");
	target_node = nullptr;
	canvas_item_editor = p_canvas_item_editor;
	preview_node = memnew(Control);
	accept = memnew(AcceptDialog);
	EditorNode::get_singleton()->get_gui_base()->add_child(accept);
	selector = memnew(AcceptDialog);
	EditorNode::get_singleton()->get_gui_base()->add_child(selector);
	selector->set_title(TTR("Change Default Type"));
	selector->connect("confirmed", callable_mp(this, &CanvasItemEditorViewport::_on_change_type_confirmed));
	selector->connect("cancelled", callable_mp(this, &CanvasItemEditorViewport::_on_change_type_closed));
	VBoxContainer *vbc = memnew(VBoxContainer);
	selector->add_child(vbc);
	vbc->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	vbc->set_v_size_flags(Control::SIZE_EXPAND_FILL);