Hi,
Have you remove the solr server when system is up? If yes, please check your solr configuration in backoffice, and keep the endpoint and port right, and point to the standalone solr server. Based on your information, seems your solr server is u...
Hi Leo, the issue seems the known issue, it is related about Drools Engine. Maybe you can consider to upgrade the drools to 7.0, and see if it is helpful for you.