Things you should verify:
1. Schematic: additional Outputs, additional Cameras, Matte FX with errors.
2. The Preview render has the same issue or is only with the final render?
3. If the issue is only with final render, what format are you using for? and check if FFMPEG is correctly added.
4. Camera position is right?
5. Eye icon is On in your columns/layers?
If you share a screenshot with us we'll have more clues to help you.
Good luck!