Reproduction steps:
1. Open the user's attached "3dtest.zip" project
2. Load the "empty" scene
3. Make sure the "Lock Input to Game View" is enabled in the Input Debugger window
4. Enter Play mode
-- Observe the crash

Reproducible with: 2020.3.2f1, 2021.1.1f1, 2021.2.0a11
Could not test with 2018.4, 2019.4 (no OpenXR available)

Notes:
- reproducible only when Vulkan Graphics API is selected
- could not reproduce with Oculus, MockHMD XR Plug-in Providers

Tested with:
- Oculus Rift

First lines of the stacktrace:
at (wrapper managed-to-native) UnityEngine.XR.OpenXR.OpenXRLoaderBase.Internal_CreateSessionIfNeeded () [0x00008] in <a571e0fe3f074363a487c71db86954c4>:0
at UnityEngine.XR.OpenXR.OpenXRLoaderBase.StartInternal () [0x00001] in C:\Users\Downloads\case_1324478-3dtest\Library\PackageCache\com.unity.xr.openxr@1.0.3\Runtime\OpenXRLoader.cs:329
at UnityEngine.XR.OpenXR.OpenXRLoaderBase.Start () [0x00036] in C:\Users\Downloads\case_1324478-3dtest\Library\PackageCache\com.unity.xr.openxr@1.0.3\Runtime\OpenXRLoader.cs:313
at UnityEngine.XR.Management.XRManagerSettings.StartSubsystems () [0x0002d] in C:\Users\Downloads\case_1324478-3dtest\Library\PackageCache\com.unity.xr.management@4.0.1\Runtime\XRManagerSettings.cs:403