"Fatal Error: 'Uncaught Error: Call to undefined method Optosigma\\Catalog\\Plugin\\Model\\ProductRepositoryBeforeSave::logger() in \/var\/www\/html\/magento2\/releases\/preprod\/2019-10-07-11-24-26-master\/app\/code\/Optosigma\/Catalog\/Plugin\/Model\/ProductRepositoryBeforeSave.php:36\nStack trace:\n#0 \/var\/www\/html\/magento2\/releases\/preprod\/2019-10-07-11-24-26-master\/vendor\/magento\/framework\/Interception\/Interceptor.php(121): Optosigma\\Catalog\\Plugin\\Model\\ProductRepositoryBeforeSave->beforeSave(Object(Magento\\Catalog\\Model\\ProductRepository\\Interceptor), Object(Magento\\Catalog\\Model\\Product\\Interceptor), false)\n#1 \/var\/www\/html\/magento2\/releases\/preprod\/2019-10-07-11-24-26-master\/vendor\/magento\/framework\/Interception\/Interceptor.php(153): Magento\\Catalog\\Model\\ProductRepository\\Interceptor->Magento\\Framework\\Interception\\{closure}(Object(Magento\\Catalog\\Model\\Product\\Interceptor), false)\n#2 \/var\/www\/html\/magento2\/releases\/preprod\/2019-10-07-11-24-26-master\/generated\/code\/Magento\/Catalog\/Model\/ProductRepository\/Interceptor.php(26): Magento\\' in '\/var\/www\/html\/magento2\/releases\/preprod\/2019-10-07-11-24-26-master\/app\/code\/Optosigma\/Catalog\/Plugin\/Model\/ProductRepositoryBeforeSave.php' on line 36"