When Selecting Presentation
Fatal error: Call to a member function on a non-object in ...../wp-includes/functions.php on line 1765
When Selecting Plug-ins
Warning: implode(): Bad arguments. in /home/content/....../wp-admin/admin-functions.php on line 1478
Couldn't open plugins directory or there are no plugins available.
This seems to have started spontaneously - I've made no changes to the functions.php file. It seems to be having trouble locating the default theme file.