Fix a Python script

I have a trading algorithm which connects to a broker and runs and trades signals. There is a particular function which refreshes the data every time new time period which has an error and I'm not really sure what's causing it. It could be losing connection to broker but I basically want the function to continue instead of causing more errors. I have a jupyter notebook I can send through but this needs to run while the market's are open. There is a demo account already set up which can be used. The error normally occurs after 4-5 hours of running so you'll need to leave it running for a few hours