Directly after installing Commander One, I am no longer able to drag and drop my Dock items. Clicking on an icon just brings up a very small box that says "No window available."

Any ideas on how I can fix this?

Thanks in advance for your help

​In order to Drag&Drop in Full mode, you should select the files, press the left button on your mouse and drag files aside, not to the top or bottom of the window.
If there is another mode is chosen, you can drag files to any side of the window.
This performance will be improved in the next updates of the app.