Unexpected token '<' and completely white screen

[bavarianviking]

http://localhost:3000 shows a complete white screen. Nothing is displayed at all.

Developer console does display an Unexpected token '<' error. When browsing issues here I see that this Unexpected token '<' error has been brought up several times already but none of the solution did do the trick for me.

What could be wrong in my set up?

[Beasta]

I had this issue. You've forgotten to run 'npm run webpack'.