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Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/vendor/matthiasmullie/minify/src/CSS.php:518 Stack trace: #0 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/vendor/matthiasmullie/minify/src/CSS.php(518): implode(Array, '|') #1 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/vendor/matthiasmullie/minify/src/CSS.php(311): MatthiasMullie\Minify\CSS->shortenHex('#sb_instagram{w...') #2 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/vendor/matthiasmullie/minify/src/Minify.php(111): MatthiasMullie\Minify\CSS->execute(NULL) #3 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/inc/functions/minify.php(380): MatthiasMullie\Minify\Minify->minify() #4 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/inc/functions/minify.php(304): rocket_minify(Array, 'css') #5 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/inc/functions/minify.php(165): get_rocket_minify_url(Array, 'css') #6 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/inc/front/minify.php(31): rocket_minify_files('<!DOCTYPE html>...', 'css') #7 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/class-wp-hook.php(324): rocket_minify_process('<!DOCTYPE html>...') #8 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/plugin.php(205): WP_Hook->apply_filters('<!DOCTYPE html>...', Array) #9 /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/inc/front/process.php(267): apply_filters('rocket_buffer', '<!DOCTYPE html>...') #10 [internal function]: do_rocket_callback('<!DOCTYPE html>...', 9) #11 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/functions.php(5427): ob_end_flush() #12 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/class-wp-hook.php(324): wp_ob_end_flush_all('') #13 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #14 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #15 /www/doc/www.kovarstvi-divis.cz/www/wp-includes/load.php(1280): do_action('shutdown') #16 [internal function]: shutdown_action_hook() #17 {main} thrown in /www/doc/www.kovarstvi-divis.cz/www/wp-content/plugins/wp-rocket/vendor/matthiasmullie/minify/src/CSS.php on line 518