Instead of creating a new document instance for a doctype, the template button macro only logs an error to the browser's console.
Solution
The projectdoc Doctype Cache may be in an invalid state.
If the cache insists that there is no blueprint for a given ID of an existing doctype, then the cache probably did not have access to that information at the first time a client sent a request. To save resources, this cache miss has been recorded and no second try will be made, unless new doctypes are installed (or similar events).
To put the cache back into a valid state, it needs to be refreshed or cleared.
The projectdoc Doctype Cache can be found in the Confluence Administration on the Cache Statistics page. This page is only accessible with admin privileges.
To resolve this issue you would either need to refresh the doctype cache or simply flush/clear the cache.
