Some standard functions are undefined in the language server (i.e. `datetime_utc_to_local`)

The following line results in a reported error The function 'datetime_utc_to_local' is not defined.

datatable(a:datetime)
[datetime("2024-01-01T12:00:00Z") ]
| extend b=datetime_utc_to_local(a, "Europe/Copenhagen")
//         ^-------------------^ The function 'datetime_utc_to_local' is not defined.