I need To fix my wordpress website
1. I can't activate any plugin because it appears this error:
Fatal error: Call to undefined function wp_doing_ajax() in /home/enrollma/public_html/wp-content/plugins/wordpress-seo/wp-seo-main.php on line 505 .
I need this to be fixed
2. I have reviews in my website, and reviews are pages but I can't put them in the menu "Reviews" like in the picture. I need this to be fixed
3. I can't post any picture in my posts. I can upload picture but I can't post them.
I need to be serious and to have experience in wordpress. PLease do not loose my time
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