But I see another problem
Did you add that domain to the system here? (brianlangley.id.au)
if you are, then you will probably have to remove the domain and add it again (addon domain)
so that the server is forced to refresh the data and assign you an IP that you currently do not have
And then upload the files to the corresponding htdocs folder
which will be located inside the folder (I assume that after you add the domain again) that starts with your domain name