Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/vendor/matthiasmullie/minify/src/CSS.php:518 Stack trace: #0 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/vendor/matthiasmullie/minify/src/CSS.php(518): implode() #1 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/vendor/matthiasmullie/minify/src/CSS.php(311): MatthiasMullie\Minify\CSS->shortenHex() #2 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/vendor/matthiasmullie/minify/src/Minify.php(111): MatthiasMullie\Minify\CSS->execute() #3 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/inc/classes/subscriber/Optimization/class-minify-html-subscriber.php(86): MatthiasMullie\Minify\Minify->minify() #4 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/inc/vendors/classes/class-minify-html.php(212): WP_Rocket\Subscriber\Optimization\Minify_HTML_Subscriber->minify_inline_css() #5 [internal function]: Minify_HTML->_removeStyleCB() #6 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/inc/vendors/classes/class-minify-html.php(110): preg_replace_callback() #7 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/inc/vendors/classes/class-minify-html.php(48): Minify_HTML->process() #8 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/inc/classes/subscriber/Optimization/class-minify-html-subscriber.php(73): Minify_HTML::minify() #9 /var/www/kpfa.org/htdocs/wp-includes/class-wp-hook.php(292): WP_Rocket\Subscriber\Optimization\Minify_HTML_Subscriber->process() #10 /var/www/kpfa.org/htdocs/wp-includes/plugin.php(212): WP_Hook->apply_filters() #11 /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/inc/front/process.php(417): apply_filters() #12 [internal function]: do_rocket_callback() #13 /var/www/kpfa.org/htdocs/wp-includes/functions.php(4757): ob_end_flush() #14 /var/www/kpfa.org/htdocs/wp-includes/class-wp-hook.php(292): wp_ob_end_flush_all() #15 /var/www/kpfa.org/htdocs/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters() #16 /var/www/kpfa.org/htdocs/wp-includes/plugin.php(484): WP_Hook->do_action() #17 /var/www/kpfa.org/htdocs/wp-includes/load.php(1072): do_action() #18 [internal function]: shutdown_action_hook() #19 {main} thrown in /var/www/kpfa.org/htdocs/wp-content/plugins/wp-rocket-master/vendor/matthiasmullie/minify/src/CSS.php on line 518