conv2+1d can not find in registry under scope name mmengine

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I want to use R(2+1)D as the backbone, when I copy /mmaction/models/backbones/resnet2plus1d.py and resnet3d.ResNet3d (class) to my script, use the following command to call, an error is reported: KeyError: 'Cannot find None in registry under scope name mmengine'

I found the place where the error occurred: /mmaction/lib/python3.8/site-packages/mmcv/cnn/bricks/conv.py, I think that conv2+1d was not added to MODELS.register_module, as shown in the figure.

But I don't know how to modify it, if you know, please leave a message below, thank you for your help