On the SDDC Manager UI, the tasks panel shows many tasks (e.g. SDDC-Manager Backup tasks or/and adding ESXi host in cluster, etc ) as "Fetching task info...".
A similar error is observed in the /var/log/vmware/vcf/commonsvcs/vcf-commonsvcs.log file in SDDC appliance:
mm dd Hr:min:sec ERROR [common,#################,####] [c.v.e.s.t.services.TaskCollector,http-nio-127.0.0.1-7100-exec-212] collect() failedorg.springframework.web.client.HttpClientErrorException$BadRequest: 400 : "{"errorCode":"GET_BACKUP_FAILED_INVALID_ID","arguments":[],"message":"Failed to retrieve backup workflow, invalid id","referenceToken":"#####"}"
The cause of this issue could be the file /opt/vmware/vcf/sddc-support/status.json is corrupted, deleted, or modified.
As this workflow requires database edits using DELETE statements please contact Broadcom support to advise on the exact steps.