Error loading document for topicref: ...
This error occurs when a document referenced by a DITA map failed to load incorrectly.
The error message contains the actual error that caused loading to fail. Common causes include:
“Unable to retrieve reference with permanent ID "…"”: the href attribute of the topicref contained a reference ID that could not be resolved by the CMS.
“cannot GET http://…/document?… (XXX)”: the CMS returned an error when Fonto attempted to load the document.
“The DOM failed validation”: See “The following nodes failed validation”.