I've recently been trying to install a template on a site and in that process I managed to go the wrong way around and simply add the whole template to /packages/ and try to get it to work that way around. The problem is now that I can't add any blocks on either the new template or the standard one, without being greeted by the error screen [see attachment].

Now from reading various topics the way to go about this error is to find the missing file/template/addon and put it back. The problem is I can't really add any file, and I can't remove the template from Concrete5 either. If I try to remove it from the Themes dashboard I get greeted by the same error message, and if I manually delete the folder Concrete5 doesn't respond and still says it's installed.

Any help would be kindly appreciated.

Emil Winther.