Fix RefResolutionError

✅ Solution

The "RefResolutionError" in PyTorch usually arises because a model configuration or checkpoint references a module attribute that no longer exists or has been renamed, often after a library update. Resolve this by inspecting the loaded model's state_dict and the model definition in your code to identify the missing or renamed attribute and update the model definition or checkpoint loading logic accordingly. Specifically, ensure the attribute name is consistent between the loaded state and the current model architecture; a common fix is to rename the attribute in the model definition or provide a mapping during checkpoint loading.