If you receive the above error at startup, Zotero wasn't able to load or update site translators or citation styles. Functionality that depends on these files, such as word processor integration, will likely not work until the problem is resolved.

Try resetting translators and styles and checking your database integrity from the Advanced → Files and Folders pane of the Zotero preferences. If that doesn't help, check file permissions in your Zotero Data Directory, specifically for the styles and translators directories.

If you're still having trouble, report the error and post a Report ID to the Zotero Forums.