http://www.marriage-saving.com
This is my web you can see some mistakes on thumbnail
I had tried 2 themes(guzel and comfy) i met same question--the thumbnail
I found the same words when actived plugins--"If something goes wrong with a plugin and you can’t use WordPress, delete or rename that file in the /home/content/f/f/l/fflapplication/html/marriage-saving/wp-content/plugins directory and it will be automatically deactivated."
i think maybe i should change the default directory
who can help me ?
