You need to provide a valid URL; your browser is a lot more tolerant about what characters it accepts, but when I copy the URL from the Chrome location bar I get the real URL:
https://plus.google.com/+Rub%C3%A9nRivera
Note the %C3
and %A9
parts; those are UTF-8 bytes encoded using URL percent encoding. The C3 A9
bytes encode a é
character.
Using the URL with percent encoding works fine.
Note that Stack Exchange cannot accept 'human readable' URLs because there is no standard encoding to be used. Google+ uses UTF-8, as do a lot of sites, but there is no RFC specification to state what encoding to use here. See What every web developer must know about URL encoding. A lone URL doesn't provide enough context for Stack Exchange to determine the correct codec to use.