This article concerns Mac OS X users only
If you can connect to the User Area from your mobile device, but cannot reach it from your desktop / laptop computer the most probable reason why is so, are the alterations made to the hosts config file on your computer by third party software.
To check that out please follow these steps:
Open Terminal app
Enter following command into terminal (and hit enter) to open the hosts file with Nano text editor with administrative priviledges
sudo nano /etc/hosts
Confirm the comand with your administrator password.
Nano editor with hosts file will be opened. If you notice any line that involves userarea.d16.pl address, please comment that line by adding # sign at the beginning of that line. If you cannot find any reference to userarea.d16.pl domain, please close the Terminal and stop following this troubleshooter.
To save the changes use CTRL + O combo and to exit from the Nano editor use CTRL + X combo on your keyboard.
To make the changes being taken into account enter following command into Terminal and hit return:
sudo killall -HUP mDNSResponder
Confirm the comand with your administrator password.
The command will flush your Mac's DNS cache, so it doesn't get confused by any changes you've made to the Hosts file.
If you can't find it, it's located in Utilities folder in Applications list when you open Finder