As we know, Moodle config requires the wwwroot variable which negates 'relative addressing'. Good for security reasons, but a pain when having issues where Admin user can login but cannot navigate the Site Admin menu for some reason.
In order to address problems, one could navigate directly to certain areas in the /admin/ interface, but who remembers those URL's? Certainly NOT I :\
So to help, attached is an sos.html page (Save Our Site) that uses relative addressing to get to some of those site admin areas related (feel free to add your own relative URLs). Any link on the sos.html page still requires the admin level person to login to the Moodle. This to say it is safe to use n troubleshooting situations. (after problems resolved one could remove the file and if needed one could upload the same page again ... in the same location ... the root of your Moodle code. It isn't 'pretty' but it doesn't need to be ... using pre tag.
'Install' of the sos.html page isn't a Moodle install ... just upload the sos.html page to the root of your Moodle code where the config.php file resides. There is nothing to change in Moodle configuration.
See attached page.
'spirit of sharing', Ken