Symptoms:
When opening the vCenter Server Appliance VAMI UI (https://vcenter-fdqn:5480) in a web browser, no login page is displayed.
This issue can occur when there are stale reconciliation files present in /storage/applmgmt/backup_restore/ and /etc/vmware/, such as:
# service-control --stop applmgmt
# mv /storage/applmgmt/backup_restore/restoreReconciliation-history.json /tmp
# mv /storage/applmgmt/backup_restore/backup-history.json /tmp
# mv /etc/vmware/backupMarker.txt /tmp
#service-control --start applmgmt
Note: In some situations, the VAMI UI might still be showing an error message, such as in the screenshot below. Should you experience this issue, please reboot the vCenter Server Appliance: