how to reproduce

• delete skin directory
• connect to cms that use that skin

Actual behavior

• the message is

  Failed to process pipeline<map:serialize type="xhtml"><map:transform type="i18n"><map:transform type="xslt"><map:transform type="i18n"><map:generate type="workspace">java.lang.NullPointerException at org.ametys.cms.clientsideelement.styles.EditorMenu.getScript(EditorMenu.java:76) at org.ametys.runtime.ui.SAXClientSideElementHelper.saxDefinition(SAXClientSideElementHelper.java:63) at org.ametys.cms.workspace.ribbon.RibbonConfigurationManager.saxRibbonDefinition(RibbonConfigurationManager.java:352) at org.ametys.cms.workspace.WorkspaceGenerator.doGenerate(WorkspaceGenerator.java:110) at org.ametys.web.workspace.WorkspaceGenerator.generate(WorkspaceGenerator.java:74) at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:579) at org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:280) at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:481) at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:144) 
  

Expected behavior

• the message should be explicit.