FORCDK-TABLE-007
Thrown by forty-cdk/table.
[forty-cdk/table] FORCDK-TABLE-007: Invalid column name {value} declared on {piece}.Cause
Column names are interpolated into the --for-table-col-<name>-width custom property and into grid-template-columns, where anything else silently produces an invalid declaration and collapses the layout.
Fix
Use only letters, digits, hyphens, and underscores.
Where it comes from
projects/forty-cdk/table/src/table-context.ts:247
A value in braces is filled in when the message is reported, so the sentence in your console names the piece, input or value that failed.