We have been experiencing some issues with creating blocks by clicking the "create"-link on content areas. The create-form is displayed, but when clicking the create-button we get an exception in the console.
POST http://site/EPiServer/cms/Stores/contentdata/ 500 (Internal Server Error)
message: "Unable to load /EPiServer/cms/Stores/contentdata/ status: 500"Followed by:
SyntaxError: Unexpected token '<'
at Object.dojo.fromJson (dojo.js:formatted:9483)When trying to create the block in the assets panel and draging it to the content area it works fine.
An upgrade to the latest Episerver version didn't fix the issue unfortunately.