Cannot drag-and-drop to character sheet

I have not been able to drag-and-drop to a character sheet. I have done this before and I know it works. The only difference now seems to be that instead of opening the character sheet in the Roll20 app, it appears to be opening in a separate Google window, I do not know why. Whenever I click something from the compendium to drag over (a spell for example) the character sheet disappears (minimizes) so I cannot drag the item over to drop in. I do not want to have to add everything manually!

You must have the sheet popped out. Drag & Drop doesnt work on popped out sheets.

Go to the My Settings tab in the right sidebarm and the checkbox 2 lines below the Master music volume level: Use Window Popouts for Characters. Ensure this is unchecked.

Here you can find a list of (other) things that doesn't work, when the sheet is in a separate window:

• https://wiki.roll20.net/Character_Sheet#Character_Sheet_in_a_separate_window

Thanks guys!