I got the same error message, only it shows up when trying to share posts via Facebook, Twitter, etc. I'm using the latest version of WordPress, Jetpack, and the Magazine Premium theme.
My url is http://www.secretlaboratory.org
I'm using Easy AdSense Pro. The first ad is 728x90 and is centered above the header. When I try a different position for this ad, the error message goes away ... but the ads don't work. "Above the Header" is the only position that works. "Beginning of Post" shows no ad while "Below Header" shows TWO ads ABOVE the header--and it makes the post's content disappear.
The second ad doesn't work at all, in any position or configuration.
The third ad is set up "End of Page," which generates two ads in two separate places toward the bottom of the screen. Aligning left, center, right does nothing. If I choose a different position, only one ad will show, sometimes none.
I've been experimenting with this plugin for several days, and frankly it doesn't work. I like all of the options and it's laid out very professionally, but the fact remains that most of those options are broken. The one configuration that I found that "works" (generates three ads per post, although not in the positions that I'd like), generates the above-mentioned error message, effectively rendering the sharing buttons useless.
In the last few days, I've tried a dozen or more AdSense plugins. There is one that is simple and generates three ads per post exactly where you want them (1-Click-AdSense)--but you can't suppress ads on specific posts and there doesn't seem to be a way to contact the author. At the moment, I'm using Instant Adsense, which allows you to suppress ads, but it only generates ONE TEXT AD at the beginning of the post. Many other plugins that I tried did not work AT ALL.
The reason that I started looking into new plugins is that certain posts on my website don't meet Google's standards--apparently, a love/sex advice column is too racy for them.
If you have any suggestions on how to fix Easy AdSense Pro, I'd like to hear them. In the meantime, there is definitely a void when it comes to AdSense plugins that are simple, feature rich, and most importantly WORK.