I think I know what's going on here.
Under 'View" can you check to see if "Show grid" and "Show origin" is turned on please.
This is the only way I could replicate this issue, are your objects currently in view of the Viewport in the black screen image?
I don't know why these would be turned off by default unless there's a hotkey for it that's accidentally been turned on.
If this isn't what's going could you let me know, then I'll need a couple more hours to work through this.