Latest update of SEO plugin 1.5.0
When saving Google+ publisher page as https://plus.google.com/+Bolcroatia
+ is removed from URL, rendering URL that does not exist...
Fix for issue #730 - GooglePlus vanity urls were saved without the `+`
@ronimarin Thank you for reporting. I've send in pull request #749 which will fix this.
Closing as pull request is now merged in master.