I don't even get the splash page, just the bezel. I tried logging out and signing back in. Same problem. I am running Windows 10.
Did you try to reboot (NOT shutdown and start the PC, reboot)?
First, try resetting the preferences: Resetting Preferences in Lightroom CC/6
Second, manually deactivate the GPU acceleration: Adobe Lightroom GPU Troubleshooting and FAQ
If it still does not start remove, reboot and reinstall: Download Photoshop Lightroom
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