Computer backup "can't backup without permissions" error for Documents folder. How can I fix this?

@Jay, 

I entered the command: sudo chflags -R nouchg "/Users/myname/Dropbox (Personal)" ~/.dropbox ~/.dropbox-master

Got the error:  /Users/myname/.dropbox ~/.dropbox-master: No such file or directory

Similar to the work account, if I leave off ~/.dropbox-master I do not get an error message.

@Jay,

Sorry, I'm not sure I know what you mean. What "folder" are we talking about? Both of my Dropbox folders are in the same general location (users/myname/Dropbox...), but perhaps I'm entering things wrong or pulling the pathname incorrectly? If you have specific instructions that I should try on that front, please let me know. I have gone to Finder, right-clicked on the folder, held the Option Key, and then selected Copy "Dropbox (CATCH Global)" as Path name, which yields: /Users/myname/Dropbox (CATCH Global)

If the folders aren't there any more, why does the error go away when I remove "~/.dropbox-master"? And why do all of the other commands appear to work? What does the "~/.dropbox-master" refer to?  How can I find where this "folder" lives?

Thanks again for all of your help!

Jay,

So, if the .dropbox-master file is deleted, do I need to recreate it in order to use the sync/backup function? If so, how should I recreate it?

I just want to use the sync/backup functionality with my Documents folder. What I've been trying to figure out is HOW to do this; I'm less interested in understanding the error message's meaning than I am in determining the next step to resolve the issue and get the automatic backup functionality working on my machine.

With that in mind, what is the next step I should take toward that goal of turning on sync for my Documents folder? And ideally, all of the ensuing steps.

Thanks again for all of your help!