Coveo search with sitecore

Question

I am making a test page in sitecore after integrating coveo search, when I make a simple coveo search page and do just the minor changing like including a facet etc it work fine and give desired results but the problem is page don't save upon pressing save button. It gives following error

I am beginner in sitecore and just can't figure out why it don't save.

I am using sitecore 8.1

Answer 1

This is what you are looking for: https://developers.coveo.com/pages/releaseview.action?pageId=33587260

Answer 2

I got the answer from the link given below and it worked in my case.

Save Return Error in Sitecore Page Editor.