"volume" names {col}, which is not a column ...

Warnings reference › chart:*:volume:missing-column

Identifier

chart:*:volume:missing-column

Raised by

Charts

Since

1.74.0

What happened

A candlestick's volume named a column the grid does not have. A pane of empty bars under a 0-to-1 axis would read as a session in which nothing traded, so the candlestick was drawn with its price pane alone.

The fix

Name the grid column that holds each period's traded volume, by its column id.

Reference

Covered in full at the API reference.