From wpForo 1.0.x to 1.1.x is a difficult update. First releases of all plugins are being changed very fast and with lots of features, so you should keep updating. You've done a middle version update, we don't know what exactly is incorrect on your website, it's hard to guess. We may check it and try to fix if you send admin login details to support[at]gvectors.com email address.

We found the issue, you've customized wpForo theme and copied to your active theme folder. This is an old version, you should remove it and to all customization again on new copy of wpForo classic theme files.