How do I access User Folders from Finder Sync Extension?

I am developing a Cocoa application with Finder Extension to set overlay icons on the file.

As soon as the user clicks on a folder that i am monitoring, i get a call to

the method

- beginObservingDirectoryAtURL

So my code is:

    - (void)beginObservingDirectoryAtURL:(NSURL *)url {
        // The user is now seeing the container's contents.
        // If they see it in more than one view at a time, we're only told once.
        NSLog(@"Current Path : %@", url.path);
        NSArray<NSString*>* children = [[NSFileManager defaultManager] subPathsAtPath:url.Path];
    }

The NSFileManager Default Manager path returns null when called from Finder Extension.

The same method call with the same path returns the elements in the main app.

Can I somehow enable monitoring a specific folder from Finder Extension?