It could be a file permission issue
On the left side click on appearance
– click on the image thumbnail
– at the bottom you will see an activate button
It will let you preview it first before it goes live.
Open the wp-config.php file and add this :
@ini_set(‘memory_limit’,’64M’);
If that does not work do this:
Open PHP.ini” file and add this:
memory_limit = 12M
Easy fix.
