designer addPanel: there is no page with a s...

Warnings reference › designer:addPanel

Identifier

designer:addPanel

Raised by

designer

Since

1.89.0

What happened

The addPanel command adds a widget to the selected page's spec. The state has no selected page, or its spec is not an object, so nothing was added and null was returned.

The fix

Select a page whose spec is an object first.

The smallest fix

designer.commands.run(addPanel, { kind: html });

Reference

Covered in full at the API reference.