I think you are trying to access a server which is not available or the functions for the logging are not working due to some problems. I think this should be a web based system (web site). Some times the servers are not available for temporally or not available permanently.
If it is a temporally disconnected or not available it will be available as soon as possible. But if the owners have been permanently remove the server or stop the service then you will not be able to log on again.
Anyway be patient for some period of time and try again after 2 or 3 days.
If you are trying to log in to your account on a particular website, try clearing your browser’s cache. On your browser, press CTRL + SHIFT + DEL to bring up the “Clear browsing data” dialog. Check or select “Browsing history” then set the option to “the beginning of time” or something similar to delete everything.
After this, try logging in again and see if it works. If it doesn’t, close your browser then open it again and then try logging in again. If it still doesn’t work, try opening the website on a different web browser and try logging in there or use a proxy like the SurfEasy Proxy for Opera if you have Opera browser.
This way you can check if there is something wrong with your IP address. I do this whenever I can’t log in to a particular website and it works for me. I don’t know what the problem is because I cannot log in but I can browse their site. This problem is related to the web server or the webmaster has restricted access to a range of IP addresses.