That sounds like a bug by the looks.
I've tried to use the widget in our cloud account and experienced a similar error.
Have raised that as a support ticket so will see what comes of it!
It does work in the Jira dashboards so you could use that there,
Depending on what you're wanting to achieve you could always scout the marketplace for some similar widgets :)
Hey @Matt Coombs
I have heard back from Atlassian and it's been recently raised as a bug here CONFCLOUD-71313: Agile Wallboard Gadget formatting is broken.
To get updates on the progress I'd suggest for you to add yourself as a watcher :)
In the meantime though, the wallboard gadget does work in the dashboard, so you could always create a jira dashboard and use that
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