Fatal error: Uncaught Error: Call to undefined function W3TCExample\w3tc_config() in /home/wptest/domains/wptest.camelia.lt/public_html/wp-content/plugins/w3-total-cache/extension-example/Extension_Example.php:19 Stack trace: #0 /home/wptest/domains/wptest.camelia.lt/public_html/wp-content/plugins/w3-total-cache/extension-example/Extension_Example.php(46): W3TCExample\Extension_Example->run() #1 {main} thrown in /home/wptest/domains/wptest.camelia.lt/public_html/wp-content/plugins/w3-total-cache/extension-example/Extension_Example.php on line 19