New answers tagged fatal-error
You are using too many static pages. Pages are hierarchical and wordpress doesn't handle page that well. The same goes for Custom Post Type with hierarchical option set. The only solution here is to ask your host to increase your RAM size. That will solve the problem for now. But if you continue to add too many pages again, you are again to hit the memory ...
Do a complete update of WordPress, including all the files. The function named "reset_mbstring_encoding" is in the wp-includes/functions.php file and has been since 3.7, so if you're missing it or some other file, then you need to make sure all the WordPress files are up-to-date.
Top 50 recent answers are included