I was cleaning up my site files and I uninstalled some templates. I uninstalled the one that that is the admin template for backend and the backend access disapeard. I am desperate. This is a SiteGround hosting 1.5 installation. I am using TerraTribune template.
Why would it let me uninstall somthing that would cause DEVASTATION??
The exact same thing happened to me before and here is how I fixed it.
You will need a joomla file package of the joomla version that you have installed on your site.
Extract it onto your pc. You will find the admin template under \administrator\templates\khepri.
Take the Khepri folder and upload it via ftp to your server under \administrator\templates\.