**//SOLVED//**
https://www.youtube.com/watch?v=e6jf4rOK204&list=PLqsK8f12rhT-BE5Chg4rXpMRbJOEKDMjI
System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce 9800 GT/PCIe/SSE2 NVIDIA Corporation 3.3.0
Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 11:00, hash: rBd663048696b2
Worked: (optional)
Short description of error
When rotating a directional light the shadows do not work in real time "using workbench".
Exact steps for others to reproduce the error
Activate the workbench engine
add a plane and a cube
change the light to SUN type
activate the shadows
rotate the light to check that the shadows do not work in real time