Running WordPress ver. 4.9.5–da_DK and Simple Staff Listing ver. 2.0.3 then I run into the same problem with no picture block available when running my own theme.
When I go to the “Edit Staff Member” page I get this:
( ! ) Warning: in_array() expects parameter 2 to be array, string given in /www_root/dbwk.famped.dk/wp-includes/theme.php on line 2629
Call Stack
# Time Memory Function Location
1 0.0007 324800 {main}( ) ../post.php:0
2 0.4905 28907120 include( '/www_root/dbwk.famped.dk/wp-admin/edit-form-advanced.php' ) ../post.php:174
3 0.4918 28910784 current_theme_supports( ) ../edit-form-advanced.php:69
4 0.4918 28911136 in_array ( ) ../theme.php:2629
Switching to another official theme does not give me the above error and I get the picture option on the “Edit Staff Member” page.
Any ideas what is wrong?