I php-fpm access.log we can see the following: [18-Jan-2018 15:03:38] WARNING: [pool www] child 2148 said into stderr: “ERROR: Unable to set php_value ‘soap.wsdl_cache_dir’” By default this parameter looks like the following: php_value[soap.wsdl_cache_dir] = /var/lib/php/wsdlcache