ZStack Cloud UI task progress is stuck and the VM list cannot load

Issue

Use this article to troubleshoot stuck UI tasks and list-loading exceptions.

Environment

• Product: ZCF
• Component: Cloud
• Affected object: UI/Task Center
• Versions: 4.x, 5.x
• Scenario: Stuck UI tasks or list-loading exceptions

Symptoms

• The UI displays a blank page, remains loading, cannot open part of a page, or returns an API exception.