Load SyntaxHighlighting also for pages in "Plain" syntax

Failed to load resource: the server responded with a status of 404 (Not Found)
:8080/xwiki/bin/jsx/SyntaxHighlighting/HighlightingModePlain%2F1.0?minify=true 

Failed to load resource: the server responded with a status of 404 (Not Found)
SyntaxHighlighting?minify=true:1 

Error: Script error for "SyntaxHighlighting_cm/mode/plain/1.0/plain/1.0"
http://requirejs.org/docs/errors.html#scripterror
    at F (require.min.js?r=1:7)
    at HTMLScriptElement.onScriptError (require.min.js?r=1:30)