Solution:
You seem to have duplicate function definitions of the function rm_dl() in wp-settings.php. Please review that file so there is only one definition.
It is also not a good idea to post links to your website and ask “please have a look”. Much better and easier for us to help if you post the specific error together with the affected files (without passwords of course!).
If there is nothing wrong with your file the error is most likely caused by some newly installed or updated theme or plugin. In worst case it’s some automated hack. In both cases you should reverse to a working backup and make sure you update carefully any plugins and base installations with security updates.