firstly I must say that I'm a bit new to these things, hosting, web...
I have a joomla based website which was working perfectly some hours ago. I've changed or touched nothing since then and now it doesn't work, Firefox gives this message:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, email@example.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Is it a problem with my web or with the hosting / server? What should I do or check when this happens?