Fatal error: Uncaught Error: Interface "Magento\Framework\Data\OptionSourceInterface" not found in /var/www/magento/html/app/code/BBNT/FredhopperDataProxy/Helper/ConfigurationState.php:13
Stack trace:
#0 {main}
thrown in /var/www/magento/html/app/code/BBNT/FredhopperDataProxy/Helper/ConfigurationState.php on line 13