Fatal error: Out of memory (allocated 6291456) (tried to allocate 4096 bytes) in /home/vebuocom/public_html/wp-includes/functions.php on line 4462

Fatal error: Uncaught Error: Call to undefined function wp_is_serving_rest_request() in /home/vebuocom/public_html/wp-includes/functions.php:3809 Stack trace: #0 /home/vebuocom/public_html/wp-includes/class-wp-fatal-error-handler.php(245): wp_die(Object(WP_Error), '', Array) #1 /home/vebuocom/public_html/wp-includes/class-wp-fatal-error-handler.php(156): WP_Fatal_Error_Handler->display_default_error_template(Array, false) #2 /home/vebuocom/public_html/wp-includes/class-wp-fatal-error-handler.php(60): WP_Fatal_Error_Handler->display_error_template(Array, false) #3 [internal function]: WP_Fatal_Error_Handler->handle() #4 {main} thrown in /home/vebuocom/public_html/wp-includes/functions.php on line 3809