Database optimization ruined blog theme

Got the tip about using WP-Optimize plugin for to make the blog run faster. But what it did though was to ”kill” my theme. Now I can’t see any posts or the slideshow at start page, and the posts is gone aswell.

here is how the homepage looks now
https://www31.zippyshare.com/v/1985442/file.html
and when I ”navigate” to a post
https://www31.zippyshare.com/v/10392217/file.html
The message is

Catchable fatal error: Object of class WP_Error could not be converted to string in /var/customers/webs/ku36/wp-content/themes/goodnews/framework/functions/mom_functions.php on line 507

I was stupid enough to run the plugin, but I don’t get why my backup didn’t help (took a backup few minutes before)

All help is appreciated!