We've had an Agile wallboard gadget working within Confluence for quite some time and it recently stopped displaying any content. If I try to edit/configure the gadget within Confluence (via the preview pane) there is no longer an option to add the board details, eg:

I experience similar issues if I try to use the gadget within a JIRA dashbord.
The actual board (Kanban) that was previously displaying via the gadget does still display if I go directly to the board in JIRA.
We are using JIRA/Confluence cloud, and my understanding is that the Agile wallboard gadget is standard for the cloud application.
Do you have any thoughts as to why this gadget may have stopped working, and can no longer be configured?
Thanks, Christian