I found no such error message anywhere in CB. No idea where it's coming from. Ensure you're installing the CB language package through CB > Plugin Management.
From what I can find that's a Joomla error. So you're either trying to install through Joomla extension manager (incorrect location) or Joomla API utilized by CBs installer is throwing it. Regardless you need to contact your host and have that enabled, please see below Joomla post regarding this.
forum.joomla.org/viewtopic.php?p=2727359