Can’t setup Flexible posts widget with Elementor

Hello

First of all thanks a lot for these wonderful free tools.

I am new to Word Press an found Flexible Posts Widget very usable and I want to use it with Elementor page builder.

The Flexible Posts Widget works properly as it must inside a Right Sidebar, however it does not allow further settings of “Get posts by” in Elementor.
The three options of this property (Get posts by), “Post Type”, “Taxonomy & Terms”, and “ID” become RED and cannot be set to anything when this widget added to an Elementor page.

Please let me know if this is an Elementors pro option or some setting I have missed.

Thanks in advance.

Regards