ConnectionError: Couldn't reach 'database' while doing distributed training

I am trying to run distributed training on 2 nodes and everything seems to be running okay on node1 but on node0 I get the following error:

ConnectionError: Couldn’t reach ‘shibing624/source_code’ on the Hub (ConnectionError)

I am not sure what the problem is, node1 has no problem connecting to the Hub and reaching the database.