I have problem to save the changes made to the page (resource), the alert message:
Confirm Navigation
The changes you have made have not been saved yet.
You can choose to stay on the current page in order to save the changes ('Cancel'), or you can leave this page, losing any chagnes you have made ('OK').
I tried to make the changes again this time with "Firefox" (I was using Google Chrome previously) and I have no problem to save it. I am not sure why this happen.