FIX: add missing dependency

assets/javascripts/wizard-custom.js

@@ -53,6 +53,7 @@
 //= require discourse/app/initializers/jquery-plugins
 //= require discourse/app/pre-initializers/sniff-capabilities
 
+//= require pretty-text/addon/engines/discourse-markdown-it
 //= require pretty-text/addon/sanitizer
 //= require pretty-text/addon/pretty-text