Packaging or Launching the 2D Side Scroller template without making any edits results in issues that differ by browser.
Firefox : A black screen appears (see screenshot)
Chrome : 1/4th of the screen appears but is still not rendering correctly and no input is taken (see screenshot)
This occurred in 4.19
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-65986 in the post.