What the title says. Here’s some images. I’ve tried searching the Blender forums and this community for ways to solve this, but I just can’t figure out what the problem is. Also, I can’t seem to replicate this issue on 2.7.
LookDev Mode
Solid Mode
Render Preview Mode
**EDIT: **
When in LookDev mode, the issue becomes less apparent if I toggle the “Scene Lights” option on the Shading Menu. Doing this makes my scene actually appear, instead of just having some black blobs over a grey background.
LookDev Mode with Scene Lights option toggled On
With this, it seems to me Blender isn’t loading/showing materials, and that the native lighting map on Eevee isn’t working, given that it is necessary for me to turn on Scene Lights in order for my scene to have lighting. Playing around with nodes on the Shading tab does nothing. Neither does switching over to Cycles (in fact, this seems to exacerbate the problem).
This what the HDR and Texture orb thingies look like on the Shading Editor:
EDIT 02/25/18: The issue has been solved with the newest updates. Textures and HDR load correctly now.