Dataprocessor not working with GridConfiguration?

I successfully set up a grid using Connector and Dataprocessor.
But when using the automatic header configuration like:
$conn->set_config(new GridConfiguration(true));
then no cell editing is available.

When I set headers manually then everything works fine.

Is this a “feature” or do I have to do additional settings for GridConfiguration?

Thanks
Ralf

By default all columns are readonly, you can configure it.

docs.dhtmlx.com/doku.php?id=dhtm … anual_mode

$config->setColTypes("ed,ed,ed");