While opening or creating any Excel file on our Skydrive with Excel Web App the following web page appears: Server Error in '/x/16.0.1727.1029' Application

•Can you edit the affected Excel file on your computer? I can open edit the excel files on my PC fine
•Have you tried another browser?  Yes, Chrome and IE10 & IE11 Do you experience this issue when using another browser? Yes
•Have you tried another computer? Yes, 4 different PC's Does the issue persist when using another computer? Yes
•How do you edit the affected file on the web page? Please provide the steps you are doing. All excel files are affected. Even if we create a new Excel file or survey as soon as you try to open it with the Excel web app it fails with the error in the title. All of the other web apps work fine (OneNote, PowerPoint and word).

This seems to be isolated to this skydrive account. I tested the same excel files with my personal skydrive account and the excel web app works fine.