One last try, then...
Navigate to ~/Library/Containers/com.apple.photolibraryd/Data/Library/Preferences/com.apple.camera.plist (which I just found), move it to your desktop, immediately shut down/restart your MBP.
If you want to be daring, you can follow that procedure for ~/Library/Containers/com.apple.photolibraryd, but be certain to save it on your desktop and be certain that Photos works as expected after you restart.
Personally, I'd start with just the .plist.
¯\_(ツ)_/¯ and =^._.^= for luck.
