Main scene fails to load for exported projects

[levidavidmurray]

Tested versions

• Reproducible on master

System information

Godot v4.4.dev.mono (eb51030) - Windows 10.0.22631 - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1070 (NVIDIA; 32.0.15.6094) - AMD Ryzen 7 2700X Eight-Core Processor (16 threads)

Issue description

I was getting the following error when launching an exported project in 4.4dev5, which instantly crashes the application:

ERROR: No loader found for resource: res://uid:/cu2wmlv7867bo (expected type: )
   at: ResourceLoader::_load (core\io\resource_loader.cpp:327)
ERROR: Failed loading scene: res://uid:/cu2wmlv7867bo.
   at: Main::start (main\main.cpp:4214)
WARNING: ObjectDB instances leaked at exit (run with --verbose for details).
   at: ObjectDB::cleanup (core\object\object.cpp:2342)

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Issue 1

Changing resource values such as application/run/main_scene or application/boot_splash/image in Project Settings results in an automatic conversion from their res:// paths to their uid:// paths (this is the value that's stored in project.godot)

Issue 2

The bit of code that determines the main scene path doesn't appear to be expecting a uid:// path. I've tracked down the code that results in res://uid:/cu2wmlv7867bo to main.cpp:4161.

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I'm not exactly sure if this code should handle the uid:// path, or if these resource paths saved under project.godot should be reverted back to their res:// paths.

In any case, manually hardcoding the paths to their res:// paths in project.godot has temporarily fixed the issue for me.

Note

I actually don't remember if this was the exact issue I was facing when building on 4.4dev5. This is an issue on latest master that I ran into after having similar issues on 4.4dev5. I built latest master because I thought this very similar issue (#99151) might've been fixed.

Steps to reproduce

1. Create a project in 4.4dev5
2. Export that project
3. Run the project

Minimal reproduction project (MRP)

N/A

[IsaacMarovitz]

I also started experiencing this issue in dev5, which persists in dev6. Seen reports from several others in the Godot Discord also.

[IsaacMarovitz]

I managed to work around this by manually editing project.godot to use a res:// path.

[IsaacMarovitz]

FWIW, this should absolutely be included in the release blockers list

[CSLRDoesntGameDev]

i've come across the same issue, and the project.godot did fix it.

[akien-mga]

Fixed by #100408.