Rebuilding the search index of HCL Connections
Connections Engagement Center is using HCL Connections API's heavily for its operation. This requires the HCL Connections search index to be intact and operating well.
Please check whether your search index is working correctly. If not, please follow the instructions of HCL to rebuild the search index. https://help.hcltechsw.com/connections/v7/admin/admin/t_admin_search_create_index.html