I'm new to Character Animator and I'm not sure why the record screen is blank.
It looks like you may have deleted the scene panel from the Record workspace.
Try resetting your Record workspace layout:
1) Make sure the Record workspace is selected
2) Now go to Window > Workspace > Reset "Record"...
That should do it!
... or you double clicked on the title of the timeline panel and it maximized. If this is the case just double click on "timeline" in top right corner again and hopefully all the other panels will come back.