config.board is on but the grid has no columns and no template, so a card would draw nothing. Supply board: { template: '<div>{{cell.name}}</div>' } or add columns.

Warnings reference › board.empty

Identifier

board.empty

Raised by

The grid (rendering)

Since

1.19.0

What happened

As with the gallery and the record card: the board presentation has no template and no columns to build one from, so it is refused and the grid stays a table.

The fix

Give board a template, or declare the grid's columns.

Reference

Covered in full at the API reference.