Catch old models error and display it nicely
Traceback:
File "/usr/src/app/apps/core/tasks.py" in transcribe
525. part.transcribe(model=model)
File "/usr/src/app/apps/core/models.py" in transcribe
590. model_ = kraken_models.load_any(model.file.path)
File "/usr/local/lib/python3.7/site-packages/kraken/lib/models.py" in load_any
157. seq = TorchSeqRecognizer(nn, train=train, device=device)
File "/usr/local/lib/python3.7/site-packages/kraken/lib/models.py" in __init__
52. if nn.model_type not in [None, 'recognition']:
File "/usr/local/lib/python3.7/site-packages/kraken/lib/vgsl.py" in model_type
471. return self.user_metadata['model_type']
Exception Type: KeyError
Exception Value: 'model_type'
Request data not supplied