We were attempting to use Responsive SharePoint from CodePlex, They’ve done a lot of heavy lifting with regards to implementing Twitter Bootstrap within SharePoint 2013. After some testing we found that certain sites were becoming corrupt and throwing Errors and Warnings. The first warning occurred after creating pages, a modal dialog would appear with the following message.
Invalid field name. {50631c24-1371-4ecf-a5ae-ed41b03f4499}
After doing some digging it appeared the field was missing from the Page Content Type.
we encountered another error when clicking on Edit SEO Properties within a page, this blew up with a more cryptic SharePoint error and referenced a Correlation GUID.
So What’s happening here….
What appears to be happening is exporting and importing design packages seems to be resetting the Page Content Types. See the print screen below.
On the left is the out of the box Page Content Types, on the right is the Page Content Type After Export. NOT GOOD.
I’ve managed to fix this by going to Site Settings –> Site Content Types, Find page in the list and adding the following content types back.
This has caused both the errors to go away. In my opinion Importing of Design Packages is severely broken.