This error can occur if the Office template file Normal.dotm is stored at a network file path:
Move the file Normal.dotm to a local file path per the Knowledgebase Solution BB723657.

OR

Download and install the Microsoft fix-it per the Microsoft article http://support.microsoft.com/kb/2553912.

Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist with implementing resolutions from these websites.