runtime error

thon3.10/urllib/request.py", line 496, in _call_chain result = func(*args) File "/usr/local/lib/python3.10/urllib/request.py", line 1391, in https_open return self.do_open(http.client.HTTPSConnection, req, File "/usr/local/lib/python3.10/urllib/request.py", line 1351, in do_open raise URLError(err) urllib.error.URLError: <urlopen error [Errno -3] Temporary failure in name resolution> During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/user/app/app.py", line 70, in <module> model1 = sm.Unet(BACKBONE, input_shape = (IMAGE_SIZE[0],IMAGE_SIZE[1],IMAGE_SIZE[2]),classes=1, activation='sigmoid',encoder_weights='imagenet') File "/home/user/.local/lib/python3.10/site-packages/segmentation_models/__init__.py", line 34, in wrapper return func(*args, **kwargs) File "/home/user/.local/lib/python3.10/site-packages/segmentation_models/models/unet.py", line 221, in Unet backbone = Backbones.get_backbone( File "/home/user/.local/lib/python3.10/site-packages/segmentation_models/backbones/backbones_factory.py", line 103, in get_backbone model = model_fn(*args, **kwargs) File "/home/user/.local/lib/python3.10/site-packages/classification_models/models_factory.py", line 78, in wrapper return func(*args, **new_kwargs) File "/home/user/.local/lib/python3.10/site-packages/efficientnet/model.py", line 488, in EfficientNetB0 return EfficientNet(1.0, 1.0, 224, 0.2, File "/home/user/.local/lib/python3.10/site-packages/efficientnet/model.py", line 470, in EfficientNet weights_path = keras_utils.get_file(file_name, File "/home/user/.local/lib/python3.10/site-packages/keras/src/utils/data_utils.py", line 351, in get_file raise Exception(error_msg.format(origin, e.errno, e.reason)) Exception: URL fetch failure on https://github.com/Callidior/keras-applications/releases/download/efficientnet/efficientnet-b0_weights_tf_dim_ordering_tf_kernels_autoaugment_notop.h5: None -- [Errno -3] Temporary failure in name resolution

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