This plugin works locally and on other sites, but with WP-portfolio online theme it shows an error.
When I enter the plugin comments manager it shows this error. This only happens with this theme. I also use Donovan theme and it works fine online and locally.
I uninstalled the plugins but there are no conflicts with StCR.
Can you please try deactivating plugins one by one and check and also please provide us the error page Url as well as plugin Url so that we can test from our end.