After an automatic update Dynamic Content for Wordpress on our site the Admin side crashed. Only by disabling Constant Contact were we able to move forward. It appears that the Constant Contact Wordpress plug-in calls Dynamic Content function with an incorrect argument type.
If anyone else has this problem disable all plug-ins from the WordPress database by deleting the value for table: (prefix)_options, record : active_options
Then login in to the admin page and re-enable your plug-ins except the Constant Contact plug in (this is version 1.10.1)
Thank you for calling this to our attention. We are looking into this issue further and will be back in touch in response to your DM on Twitter.