If you have difficulty accessing Nearmap on your network, but not on any other networks (e.g. on a smartphone using 3G/4G data), a proxy server may be interfering with downloads or authentication. Proxy servers are usually established by an IT department to serve as a guarded gateway to the Internet.
Please ensure that the following can be accessed through the proxy server unhindered. These apply to the MapBrowser:
For WMS, you will need to access: