News summarisation app crashing

Not sure why my app is crashing.

This happens after successful downloads of required packages and a Transformers model.

The relevant parts of the log file are below:

2021-01-09 17:04:26.412 Lock 139651517031888 released on /home/appuser/.cache/huggingface/transformers/4ccdf4cdc01b790f9f9c636c7695b5d443180e8dbd0cbe49e07aa918dda1cef0.fa29468c10a34ef7f6cfceba3b174d3ccc95f8d755c3ca1b829aff41cc92a300.lock
[manager] Error checking Streamlit healthz: Get “http://localhost:8501/healthz”: dial tcp 127.0.0.1:8501: connect: connection refused

Any thoughts are much appreciated! Thanks!