Dashboard question

As shown in the attached picture, I tried to do the same as the dashboard in the building demo, but an error occurred.

It says to define 'dashboard', but where should I define it?

Please tell us.

You have a previous error to sort out first. The Query itself is giving an Error_Exception.

There is no mention of a function getInstalledWidgets() in the online docs as far as I can see.

Ah..?

thank you for telling me. I'll check.