Here is what it looks like in the Viewport and in the Render:
I am using Manual Exposure. Why there is such a big difference between Viewport and final Render?
Looks like I had this problem:
Sub-level ‘…’ is set to blueprint streaming and will not be visible during a render unless a Sequencer Visibility Track controls its visibility or you have written other code to handle loading it.
His @ClockworkOcean solution helped me: