you can try a couple of work arounds
You can either open the permissions up (777)
Or you can make your user "own" the folder.
So here is how to do both:
In order to own the folder yourself instead of root:
Substitute your own user for stratus (thats me
Why do this method: Because it is technically a better fix than opening up that directory to be world writeable. You wouldn't want some stray process to cause you issues.
I have noted that there are others with your Error which may be caused by the Files (Nautilus) and not the actual folder itself