The tutorial is not able to proceed further from the step "Select the Ramp Prefab" (Step 5) even after selecting "Ramp" prefab.

Stepto Repro:
1. Open Unity
2. In the Launcher go to the Learn section.
3. Start "04: Prefab power - Ramping up" tutorial.
4. Follow the tutorial up to the step "Select the Ramp Prefab" (Step 5).
5. Select Ramp prefab from project window as described in the tutorial.

Actual Result:
Next button in the tutorial is not active to proceed further even after selecting Ramp prefab.

Expected Result:
Next button should be enabled to proceed further after "Select the Ramp Prefab" (Step 5).

Environment:
Windows and Mac

Occurring with:
2018.3.0a8, 2018.3.0a7, 2018.3.0a6, 2018.2x0-Improved Prefabs
Working with:
2018.3.0a5, 2018.3.0a3

Assumptions: Introduction of improved prefabs in 2018.3.0a6 might be the cause.