I can't remember how to do that. I went to Finder - Go - Go to folder but couldn't find it. I finally found containers but couldn't find the exact match. Please send the roadmap.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.
Not sure how to navigate to the following either. 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.
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