Json2.js missing

Dec 16, 2016 at 7:33 AM
After importing the CRM solution and showing the Notes Drag-n-Drop element on a form, a 404 error occurs for the file cxp_/Json2.js when opening the form.
The Json2 file is not part of the CRM solution but exists in the CodePlex repository, so do I have to manually add it or am I missing something.