Isaac Sim Core Extension on IsaacSim 6.0 can't be enabled

[enzozo]

Description

Cannot enable IsaacSim.Core extensions.
Blocking for Sensors simulation, ROS2Bridge, etc...

2026-02-25 09:35:35 [Error] [omni.ext._impl.custom_importer] Failed to import python module isaacsim.core.api. Error: cannot import name '_simulation_manager' from partially initialized module 'isaacsim.core.simulation_manager' (most likely due to a circular import) (c:/users/lsi-vrroom-9/documents/ed254914/arise/isaacsim_6.0.0/isaacsim/_build/windows-x86_64/release/exts/isaacsim.core.simulation_manager/isaacsim/core/simulation_manager/init.py). Traceback:

Isaac Sim version

6.0.0

Operating System (OS)

Windows

GPU Name

RTX 4090

GPU Driver and CUDA versions

Driver 591.74

Logs

2026-02-25 09:35:35 [Error] [omni.ext._impl.custom_importer] Failed to import python module isaacsim.core.api. Error: cannot import name '_simulation_manager' from partially initialized module 'isaacsim.core.simulation_manager' (most likely due to a circular import) (c:/users/lsi-vrroom-9/documents/ed254914/arise/isaacsim_6.0.0/isaacsim/_build/windows-x86_64/release/exts/isaacsim.core.simulation_manager/isaacsim/core/simulation_manager/init.py). Traceback:

Additional information

No response