Not sure what to suggest in that case.
The cameras file has a very simple layout. What I would be interested to know is this. For the person that has copied the “cameras.cfg” into their simulator, and found its not working, what happens when you use the key sequence to create a new custom camera view?
The second you press that sequence, if that file does not exist for that aircraft it will create the file. The folder may already exist because of the “state.cfg” file, so you should see a new “cameras.cfg” file appear next to it. If that file didn’t exist before, then the file was copied in to the wrong location.