I have never added google authorship before. So when I tried to add it to my website yesterday, I used over 4 hours trying to make things work.
I did what Google said. I did what youtubers said. I did what bloggers said. I just couldn't make it work.
With this plugin it worked in 5 minutes (checked with googles own tool).
I want to mention one mistake I did. I copied the whole google + url like this:
It does not work if you include the /posts. It should look like this instead:
That is my comment. Have a nice day, and thanks to the author of this plugin.