ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - ERROR - Oh, whilst you’re here, here’s an explanation of the most common online error messages: 400 - Bad Request There's something wrong with the address you entered. You may not be authorized to access the web page, or maybe it no longer exists. 401 - Unauthorized You can't access a website because you're not on the guest list, your password is invalid or you have entered your password incorrectly. 403 - Forbidden Problem: Essentially the same as a 401. 404 - Not Found Problem: Either the web page no longer exists on the server or it is nowhere to be found. 503 - Service unavailable Problem: Your Internet service provider (ISP) or your Internet connection may be down. Bad file request - Problem: Your web browser may not be able to decipher the online form you want to access. There may also be a technical error in the form. Connection refused by host - Problem: You don't have permission to access the page or your password is incorrect. Failed DNS lookup - Problem: DNS stands for the Domain Name System, which is the system that looks up the name of a website, finds a corresponding number (similar to a phone number), then directs your request to the appropriate web server on the Internet. When the lookup fails, the host server can't be located. File contains no data - Problem: The site has no web pages on it. Host unavailable - Problem: The web server is down. Host unknown - Problem: The web server is down, the site may have moved, or you've been disconnected from the Net. Network connection refused by the server - Problem: The web server is busy.