With the 4.2 M10
How to reproduce it :
- use this sitemap-icons.xml file in attachment
- start the CMS : the sitemap panel is empty and I get this error :
Caused by: java.lang.NullPointerException at org.ametys.web.sitemap.DefaultSitemapDecoratorsHandler.getIcon(DefaultSitemapDecoratorsHandler.java:104)