Bunifu UI v1.4 controls initializing issues

Hello, I have some problems with adding and using some of the controls:

1. Adding a bunifuDragControl a null reference exception shows up after starting the form.
“An unhandled exception of type ‘System.NullReferenceException’ occurred in Bunifu_UI_v1.4.dll”

2. Adding a bunifuCustomDataGrid also a null reference exception shows up after starting the form.
“An unhandled exception of type ‘System.NullReferenceException’ occurred in Bunifu_UI_v1.4.dll”
Stops at this line in the designer -> this.bunifuCustomDataGrid1.DoubleBuffered = true;

3. I removed the form borders from the form but I would like to drag and move it. I solved it by adding drag option to the title label, but also want to drag and move the whole form.
One of the video I could see:
Bunifu.Framework.Lib.Drag DragForm = new Bunifu.Framework.Lib.Drag();
But I can’t see this Drag control under the namespace, it is still available?