Template not defined for node "XXX" in mode: default mode.

This error may be thrown when Fonto did not find a schema experience configuration entry for a node. This means a family configuration for said element is absent or not included. Check if the file containing the configuration for the selector which should match is loaded by the browser and use the xpath playground to test the XPath selector which is expected to match.

This may also mean the namespace configuration misses an entry for the namespace related to the element. Because the namespace resolving in the XPath engine uses the application configuration, selectors matching in the xpath playground may not match similar elements in FontoXML.