Error: ''AttributeError: 'str' object has no attribute 'META_ARCHITECTURE'''

[mahfuz-raihan]

The error seem like-

[/usr/local/lib/python3.7/dist-packages/detectron2/modeling/meta_arch/build.py](https://localhost:8080/#) in build_model(cfg)
     19     Note that it does not load any weights from ``cfg``.
     20     """
---> 21     meta_arch = cfg.MODEL.META_ARCHITECTURE
     22     model = META_ARCH_REGISTRY.get(meta_arch)(cfg)
     23     model.to(torch.device(cfg.MODEL.DEVICE))

AttributeError: 'str' object has no attribute 'META_ARCHITECTURE'

How can I solve this? or Which attribute I should check with which point?