Can you try execute this following SQL in your database and see how it goes?

Replace that #__ to your table prefix before you execute this SQL query.

ALTER TABLE `#__easyblog_post` ADD `autopost_date` datetime DEFAULT '0000-00-00 00:00:00';

By the way, may i know which Easyblog version you upgrade from?

Can you also update us with your site backend and FTP access at http://stackideas.com/dashboard/site if the issue still persists?