pinned columns need {n}px of a {m}px viewport, so the {k} unpinned column(s) have no room and cannot be seen. Unpin some, narrow them, or widen the grid.

Warnings reference › columns.pinned-overflow

Identifier

columns.pinned-overflow

Raised by

The grid (rendering)

Since

1.4.0

What happened

The pinned regions together are wider than the grid, so the centre region has no width left. The unpinned columns still exist and still render at their minimum widths - underneath the pinned regions, invisible at every scroll position, with nothing to tell the reader they are there. The grid does not unpin anything on your behalf: which column to give up is your decision.

The fix

Unpin a column, narrow the pinned ones, or give the grid more width.

The smallest fix

grid.columns.pin('actions', null);   // unpin

Reference

Covered in full at the API reference.