Hi ecweb
First to debug which could be the reason update your php version to a more recent, you are running on a 5.4 release, same for joomla version, update it.
Also it seems that you have no rights to add new settiings look at all the 403 errors coming on your pages, maybe you should have a look at your admin tools settings first.
https://prnt.sc/oq3ra8
First to make updates take a full website backup.