Edit on 2/21/15: This appears to have been a problem that was created by a recent Office update that broke ActiveX controls. For a step-by-step guide to fix your client please see the link here: http://excelmatters.com/2014/12/10/office-update-breaks-activex-controls/ Special thanks to the amazing testers who volunteered to help track this down!
Some people are reporting seeing the following error when opening the game:
I have received reports of this occurring in both Office 2010 and 2013 however I am unable to recreate the bug on my testing machines.
I am now asking for volunteers who are using systems that are encountering the above bug to provide feedback on updated versions so that I can try to tackle this. If you’d like to volunteer please let me know at with your operating system and excel version and I shall add you to the tester list.
Thank you for your patience and your assistance with this bug.