cjestley
Hi,
I see this error on your site: Fatal error: Class 'JAuthenticationHelper' not found in .../administrator/modules/mod_login/mod_login.php on line 16
It seems that you upgrade Joomla on your site and there was issue with that upgrade, you can search in Joomla forum for solution. Like this one: https://forum.joomla.org/viewtopic.php?t=937806
Regards