title: SavedModel file does not exist when using Tensorflow hub
body: <p>When trying to use the <code>hub.load</code> function from <code>tensorflow_hub</code>, I get an <code>OSError: SavedModel file does not exist at:</code> error.</p>
  <p>The weird thing is that it worked a few days ago, so I don't quite understand why I'm getting this error now.</p>
  <p>Code to reproduce:</p>
  <pre><code>import tensorflow as tf
  import tensorflow_hub as hub
  
  URL = 'https://tfhub.dev/google/universal-sentence-encoder/4'
  embed = hub.load(URL)
  </code></pre>
  <p>Specific error received:</p>
  <pre><code>OSError                                   Traceback (most recent call last)
  &lt;ipython-input-11-dfb80f0299b2&gt; in &lt;module&gt;
        1 URL = 'https://tfhub.dev/google/universal-sentence-encoder/4'
  ----&gt; 2 embed = hub.load(URL)
  
  ~/opt/anaconda3/lib/python3.7/site-packages/tensorflow_hub/module_v2.py in load(handle, tags)
      100   if tags is None and is_hub_module_v1:
      101       tags = []
  --&gt; 102   obj = tf_v1.saved_model.load_v2(module_path, tags=tags)
      103   obj._is_hub_module_v1 = is_hub_module_v1  # pylint: disable=protected-access
      104   return obj
  
  ~/opt/anaconda3/lib/python3.7/site-packages/tensorflow/python/saved_model/load.py in load(export_dir, tags)
      576     ValueError: If `tags` don't match a MetaGraph in the SavedModel.
      577   &quot;&quot;&quot;
  --&gt; 578   return load_internal(export_dir, tags)
      579 
      580 
  
  ~/opt/anaconda3/lib/python3.7/site-packages/tensorflow/python/saved_model/load.py in load_internal(export_dir, tags, loader_cls)
      586     tags = nest.flatten(tags)
      587   saved_model_proto, debug_info = (
  --&gt; 588       loader_impl.parse_saved_model_with_debug_info(export_dir))
      589 
      590   if (len(saved_model_proto.meta_graphs) == 1 and
  
  ~/opt/anaconda3/lib/python3.7/site-packages/tensorflow/python/saved_model/loader_impl.py in parse_saved_model_with_debug_info(export_dir)
       54     parsed. Missing graph debug info file is fine.
       55   &quot;&quot;&quot;
  ---&gt; 56   saved_model = _parse_saved_model(export_dir)
       57 
       58   debug_info_path = os.path.join(
  
  ~/opt/anaconda3/lib/python3.7/site-packages/tensorflow/python/saved_model/loader_impl.py in parse_saved_model(export_dir)
      111                   (export_dir,
      112                    constants.SAVED_MODEL_FILENAME_PBTXT,
  --&gt; 113                    constants.SAVED_MODEL_FILENAME_PB))
      114 
      115 
  
  OSError: SavedModel file does not exist at: /var/folders/77/rvfl368x44s51r8dc3b6l2rh0000gn/T/tfhub_modules/063d866c06683311b44b4992fd46003be952409c/{saved_model.pbtxt|saved_model.pb}
  </code></pre>