I installed a component called com-joomsef to my joomla website and all of a sudden my whole wbsite went down with this error: Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, 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. does anyone know how to fix it? thanks
Open FTP, delete the file called .htaccess (back it up first), then check if your website is working.