Camera model
Raspberry pi cam V2
What is the problem?
I am unable to enable the custom image preferences, I keep getting this error.
" Unable To Enable Custom Preferences
An unexpected error was raised while testing custom image preferences for the 'Raspberry Pi cam' camera profile."
What did you already try to solve it?
I tried following the video made by formerluker on youtube but no avail. Not sure where I have made a mistake.
Logs (/var/log/webcamd.log, syslog, dmesg, ... no logs, no support)
Additional information about your setup (OctoPrint version, OctoPi version, ...)
Using an ender3 V2 with a raspberry 3B
Hi did you figure out a way to solve this issue? I've got the same 
I used the guide that is available in Octoprint and it worked for me.
I'm using an Ender 3 V2 with a RaspberryPi 4
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Go to the Octolaps tab and click on the pencil next to your Webcam (Image 1: Imgur: The magic of the Internet )
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in the window that opens, scroll to the bottom and click on the question mark next to the checkbox for enabled (Image 2: Imgur: The magic of the Internet )
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Another window will open. I simply followed the instructions on this page and it enabled custom image preferences. (Image 3: Imgur: The magic of the Internet )
Hopefully, that is of some use.