Isaac Sim crashing for guest login for AirLab omniverse Nucleus

[andrewjong]

AirStack Version
0.18.0 / 0.19.0-alpha.0

Describe the bug
Isaac Sim will crash at startup if omni_pass.env is left with guest credentials

2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: Traceback (most recent call last):
2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: File "/isaac-sim/AirStack/simulation/isaac-sim/launch_scripts/example_multi_drone_scene_import.py", line 27, in
2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: from pegasus.simulator.logic.interface.pegasus_interface import PegasusInterface
2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: File "/isaac-sim/.local/share/ov/data/documents/Kit/shared/exts/pegasus.simulator/pegasus/simulator/init.py", line 9, in
2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: from .extension import Pegasus_SimulatorExtension
2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: File "/isaac-sim/.local/share/ov/data/documents/Kit/shared/exts/pegasus.simulator/pegasus/simulator/extension.py", line 30, in
2026-05-21T00:47:47Z [13,072ms] [Error] [omni.kit.app._impl] [py stderr]: from pegasus.simulator.params import MENU_PATH, WINDOW_TITLE, DEFAULT_WORLD_SETTINGS
2026-05-21T00:47:47Z [13,073ms] [Error] [omni.kit.app._impl] [py stderr]: File "/isaac-sim/.local/share/ov/data/documents/Kit/shared/exts/pegasus.simulator/pegasus/simulator/params.py", line 41, in
2026-05-21T00:47:47Z [13,073ms] [Error] [omni.kit.app._impl] [py stderr]: NVIDIA_ASSETS_PATH = str(nucleus.get_assets_root_path())
2026-05-21T00:47:47Z [13,073ms] [Error] [omni.kit.app._impl] [py stderr]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-05-21T00:47:47Z [13,073ms] [Error] [omni.kit.app._impl] [py stderr]: File "/isaac-sim/exts/isaacsim.storage.native/isaacsim/storage/native/nucleus.py", line 496, in get_assets_root_path
2026-05-21T00:47:47Z [13,073ms] [Error] [omni.kit.app._impl] [py stderr]: raise RuntimeError(f"Could not find assets root folder: {default_asset_root}")
2026-05-21T00:47:47Z [13,073ms] [Error] [omni.kit.app._impl] [py stderr]: RuntimeError: Could not find assets root folder: omniverse://airlab-nucleus.andrew.cmu.edu/NVIDIA/Assets/Isaac/5.1

To Reproduce
Steps to reproduce the behavior:

1. Set omni_pass.env username and password to guest
2. airstack up isaac-sim
3. crashes

Expected behavior
Should not crash, should be able to access folder

Host Compute (please complete the following information):
All