The main cause to this problem is the ISP filtering imposed by the country's rules and laws. However, even if you're blocked, you can use a VPN application to bypass these filters. Cyberghost VPN is a good service that may help you use the application how you want it. Download the application via the Software Informer application page and install it. You might need to approve driver installation related to virtual network adapter during the actual install procedure.
If have the possibility to connect even if you don't have an account, but it's best to create one on the main website.