Error thrown

Call to undefined function ctype_upper()


Fatal error: Uncaught Error: Call to undefined function ctype_upper() in /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-content/mu-plugins/endurance-page-cache.php:495 Stack trace: #0 /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-includes/class-wp-hook.php(324): Endurance_Page_Cache->option_handler('_transient_time...', '1732143403', 1732143829) #1 /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #2 /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-includes/option.php(1022): do_action('updated_option', '_transient_time...', '1732143403', 1732143829) #4 /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-includes/option.php(1560): update_option('_transient_time...', 1732143829) #5 /hermes/bosnacweb02/ in /hermes/bosnacweb02/bosnacweb02cd/b450/dot.mkerley/public_html/website1/wp-content/mu-plugins/endurance-page-cache.php on line 495