Crash on init when using viewport sky environment

[Stubenhocker1399]

Hello! 👋

I've encountered an issue using this library when having a scene with a sky enviroment set up pointing to a viewport texture.

The in-editor output produces no error:

When directly looking at the Editors log you can see it crashes with ERROR: OpenXR Failed to create swapchain 0! [XR_ERROR_RUNTIME_FAILURE]:

Running: /usr/bin/godot --path /home/username/Projects/Godot/OpenXR-Sky-Viewport-Bug --remote-debug 127.0.0.1:6007 --allow_focus_steal_pid 323767 --position 2688,420
Godot Engine v3.5.1.stable.arch_linux - https://godotengine.org
OpenGL ES 2.0 Renderer: AMD Radeon RX Vega (vega10, LLVM 14.0.6, DRM 3.47, 5.19.12-zen1-1-zen)
 
ERROR: Cannot get path of node as it is not in a scene tree.
   at: get_path (scene/main/node.cpp:1780)
ERROR: (Node not found: "Viewport" (relative to "").)
   at: get_node (scene/main/node.cpp:1465)
ERROR: ViewportTexture: Path to node is invalid.
   at: setup_local_to_scene (scene/main/viewport.cpp:70)
Running on OpenXR runtime: SteamVR/OpenXR 0.1.0
Running on Linux, using SteamVR workaround for issue https://github.com/ValveSoftware/SteamVR-for-Linux/issues/421
OpenXR Runtime only supports OpenGL version 4.3 - 4.6!
OpenXR Graphics: Display %p, Context %lx, Drawable %lx
OpenXR Using OpenGL version: 4.6 (Compatibility Profile) Mesa 22.1.7
OpenXR Using OpenGL renderer: AMD Radeon RX Vega (vega10, LLVM 14.0.6, DRM 3.47, 5.19.12-zen1-1-zen)
WARNING: OpenXR Interaction profile /interaction_profiles/samsung/odyssey_controller is not supported on this runtime
     at: parse_interaction_profiles (src/openxr/OpenXRApi.cpp:2875)
WARNING: OpenXR Interaction profile /interaction_profiles/huawei/controller is not supported on this runtime
     at: parse_interaction_profiles (src/openxr/OpenXRApi.cpp:2875)
OpenXR Interface initialized
HMD refresh rate is set to 90
OpenXR session idle
ERROR: OpenXR Failed to create swapchain 0! [XR_ERROR_RUNTIME_FAILURE]
   at: xr_result (src/openxr/OpenXRApi.h:351)
OpenXR session begun

================================================================
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v3.5.1.stable.arch_linux
Dumping the backtrace. Please include this when reporting the bug on: https://github.com/godotengine/godot/issues
[1] /usr/lib/libc.so.6(+0x38a00) [0x7f6880769a00] (??:0)
[2] /home/username/.local/share/Steam/steamapps/common/SteamVR/bin/linux64/vrclient.so(+0x1836ad) [0x7f68037836ad] (??:0)
[3] /home/username/.local/share/Steam/steamapps/common/SteamVR/bin/linux64/vrclient.so(+0x164cd2) [0x7f6803764cd2] (??:0)
[4] /usr/lib/libopenxr_loader.so.1(xrLocateViews+0x77) [0x7f6838097177] (??:0)
[5] OpenXRApi::process_openxr() (??:0)
[6] /usr/bin/godot(+0x29363f0) [0x55f83a7333f0] (??:0)
[7] /usr/bin/godot(+0x93f14f) [0x55f83873c14f] (??:0)
[8] /usr/bin/godot(+0x905fea) [0x55f838702fea] (??:0)
[9] /usr/lib/libc.so.6(+0x23290) [0x7f6880754290] (??:0)
[10] /usr/lib/libc.so.6(__libc_start_main+0x8a) [0x7f688075434a] (??:0)
[11] /usr/bin/godot(+0x909d55) [0x55f838706d55] (??:0)
-- END OF BACKTRACE --
================================================================

Here's a small test project that crashes as soon as you click the "Initialise VR" button (need to install openxr addon when opening):
OpenXR-Sky-Viewport-Bug.zip