error

I am getting this error, unable to correct it, please help

```
`Traceback (most recent call last):
File "main.py", line 29, in
tf.app.run(main=main, argv=[sys.argv[0]] + unparsed)
File "/Users/neutrino/apple/apple/lib/python2.7/site-packages/tensorflow/python/platform/app.py", line 43, in run
sys.exit(main(sys.argv[:1] + flags_passthrough))
File "main.py", line 17, in main
trainer = Trainer(config, rng)
File "/Users/neutrino/apple/simulated-unsupervised-tensorflow/trainer.py", line 35, in __init__
self.data_loader = DataLoader(config, rng=self.rng)
File "/Users/neutrino/apple/simulated-unsupervised-tensorflow/data/gaze_data.py", line 167, in __init__
self.synthetic_data_dims = list(imread(self.synthetic_data_paths[0]).shape) + [1]
IndexError: index 0 is out of bounds for axis 0 with size 0`
```