@Henry_Chibueze
Didn’t work same error:
Downloading: "https://github.com/benihime91/retinanet_pet_detector/releases/download/retinanet_v1.0/resnet34-retinanet-weights.pth.tar" to /Users/ayushman/.cache/torch/checkpoints/resnet34-retinanet-weights.pth.tar
100%|██████████| 117M/117M [01:36<00:00, 1.27MB/s]
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
 in 
      1 url = 'https://github.com/benihime91/retinanet_pet_detector/releases/download/retinanet_v1.0/resnet34-retinanet-weights.pth.tar'
----> 2 state_dict = torch.hub.load_state_dict_from_url(url, map_location='cpu')

~/opt/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/hub.py in load_state_dict_from_url(url, model_dir, map_location, progress, check_hash)
    502             members = cached_zipfile.infolist()
    503             if len(members) != 1:
--> 504                 raise RuntimeError('Only one file(not dir) is allowed in the zipfile')
    505             cached_zipfile.extractall(model_dir)
    506             extraced_name = members[0].filename

RuntimeError: Only one file(not dir) is allowed in the zipfile