Playing mode not working for even an empty project with Unity 2019.1.1f1

Dear all,

I created a new 2D project, opened it, pressed the play button, and no game screen was showed up.
I did nothing, no UI, no script, etc. I tried created other projects, some are with UI like panel and button, and some with new script. The results are the same. The game screen just refused to appear.
I am not sure, but such an issue seems to occur after I upgrade the Unity Hub from 1.6.x to 2.0.0.
The empty project and other similar 2D UI project can enter the play mode without questions.
They still work in the upgraded Unity Hub. The play mode issue just affect new projects.
By the way, I use a Personal Unity, and my one-week license is still valid.

I found that the Game view can work. So the problem has been solved for me.