[BUG] Unknown normalization method: None

[dec32]

Bug Description

The experiment action_policy_droid_nano sets action_normalization to None, which is not compatible with cosmos_framework/data/vfm/action/action_normalization.py

Reproduction Steps

Follow the official example that uses examples/launch_sft_action_policy_droid.sh

Reproducibility:

• Always
• Intermittently (~___% of the time)
• Only once

Ouput

[rank0]:   File "/data0/dec/workspace/wat/extern/cosmos-framework/cosmos_framework/data/vfm/action/action_normalization.py", line 43, in normalize_action 
[rank0]:     raise ValueError(f"Unknown normalization method: {method!r}")
[rank0]: ValueError: Unknown normalization method: None