These errors suggests that there were problems connecting to the demo API, i.e. the server is not responding at all or not responding in a time. I saw that too when running my own tests. It's not that worrying as I think the demo server is also used for development purposes for IG, that is they will sometimes restart it to push new releases etc to the demo environment.
If you plan to run additional tests, could you please delete your log-file before starting Zorro? It makes it easier for me to determine exactly what is relevant and not in the log.
