Blender Viewport suddenly blank The viewport of my Blender project recently went completely blank except the cursor. I rendered once and only the HDR is seen. I've checked all the visibility options and everything seems okay.

Here is a screenshot:


Here is a link to the project file:

https://drive.google.com/open?id=1f78fxMpFFBaggM_THZPPZF_1a9s1jjPu
Your issue is that you've moved your viewport really far away from your scene, out of its render distance, so you couldn't even see your objects anymore.

One quick solution is to select any object of your scene (or just press A), and use the "view selected" function available in the View menun or via Numpad .. That's it.