I have been attempting to get a plugin working on WordPress.
The sole error message from WordPress has been: "Are you sure you want to do this? Please try again." The latter three words are a circular link back to the page.
Checking via Google, this appears to be an error message generated by Google and not the plugin.
I cannot strongly criticize this error message enough. It scores nearly as high on the top 10 list of useless error messages as "Keyboard not found, press any key to continue."
To be more precise and less hyperbolic, the message tells the user absolutely nothing whatsoever about what is going on. It is not a true confirmation dialogue because there is not an opportunity to answer the question being posed. The link in this particular case merely goes to the same page; I am not sure if this happens in every other case.
Googling revealed that this may have something to do with something called a "nonce" which superceded the strategy of checking the HTTP referrer. This, to be honest, is above my head a bit. But a dialogue attempting to explain some of it ... or, frankly, saying ANYTHING that actually related to whatever was going on ... would have been mountains upon mountains more useful than this piece of crud.
I would very strongly advocate that this error message be changed to be a more intelligent description of whatever is generating the error message, along with a suggestion of what avenue the user might pursue in order to fix it.
As it stands, I have absolutely no idea where the error lies and no idea what to investigate to fix it, and that is because such initial guidance is usually provided by an error message. This message fails at the basic purpose of what an error message should perform.