No error code given and no way to debug. Never had any issues running Lightroom in the past...
I've tried reinstalling Lightroom (even used the Adobe Cleaning Tool to remove everything) with no luck.
So far I've just opted to install a previous version of LR (v5) and it works perfectly fine.
Anyone have any ideas on how to proceed?
No idea, but I seem to be having a similar issue -- I don't even get the splash screen or an error box, though. Just ... nothing.
v5 works, Photoshop CC works ...
I've fixed mine by rolling back the Windows updates.
You can recover to your previous Win10 build at: Settings --> Update & Security --> Recovery