Fatal error: Uncaught Error: Call to undefined function wp_is_valid_utf8() in /home/hichamasmani/public_html/wp-includes/formatting.php:2287 Stack trace: #0 /home/hichamasmani/public_html/wp-includes/class-wp-taxonomy.php(378): sanitize_title_with_dashes('category_name') #1 /home/hichamasmani/public_html/wp-includes/class-wp-taxonomy.php(290): WP_Taxonomy->set_props('post', Array) #2 /home/hichamasmani/public_html/wp-includes/taxonomy.php(532): WP_Taxonomy->__construct('category', 'post', Array) #3 /home/hichamasmani/public_html/wp-includes/taxonomy.php(63): register_taxonomy('category', 'post', Array) #4 /home/hichamasmani/public_html/wp-settings.php(513): create_initial_taxonomies() #5 /home/hichamasmani/public_html/wp-config.php(106): require_once('/home/hichamasm...') #6 /home/hichamasmani/public_html/wp-load.php(50): require_once('/home/hichamasm...') #7 /home/hichamasmani/public_html/wp-blog-header.php(13): require_once('/home/hichamasm...') #8 /home/hichamasmani/public_html/index.php(18): require('/home/hichamasm...') #9 {main} thrown in /home/hichamasmani/public_html/wp-includes/formatting.php on line 2287