Reason:

You are using FSI Cache and prefer HTML Code snippets using FSI Cache over FSI Server

Solution:

Edit your

webappsfsiWEB-INFconfigdefaultprefs.xml

In the prefs node add the proxyURL, e.g.

http://cache.domain.com/fsicache

Replace the URL Above with your FSI Cache request root.
When using FSI Server, FSI Viewer will assume the assume “server”, “viewer” and “js” as the proxyServerPattern, proxyViewerPath and proxyJSPath. Please make sure these profiles exist on FSI Cache.

You can also set the ProxyURL using FSI Administrator using Common Task / Preferences.
Next you can choose to add it to the default preferences for all users or choose a certain user.
Add “ProxyURL” as the name (or click on the bold “ProxyURL” to automatically fill the field and add the URL as the value. Then click “Add”.