Problem with 10.11.2 Upgrade

after installing the latest upgrade to El Capitan I get an error message from Safari when attempting to install add-ons from DevonthinkPro.
First I got an error message saying that the plugin was incompatible and was disabled. Then when I attempted to install add-on’s Safari generated a message saying there was a problem but no details were provided.

Are there any known problem?

Install it from here: … 679S2QUWR8