Caused by: java.lang.IllegalArgumentException: MALFORMED
	at java.util.zip.ZipCoder.toString(ZipCoder.java:58)
	at java.util.zip.ZipFile.getZipEntry(ZipFile.java:567)
	at java.util.zip.ZipFile.access$900(ZipFile.java:61)
	at java.util.zip.ZipFile$ZipEntryIterator.next(ZipFile.java:525)
	at java.util.zip.ZipFile$ZipEntryIterator.nextElement(ZipFile.java:500)
	at java.util.zip.ZipFile$ZipEntryIterator.nextElement(ZipFile.java:481)
	at org.ametys.cms.file.FileHelper._unzip(FileHelper.java:235)
	at org.ametys.cms.file.FileHelper.addOrUpdateFile(FileHelper.java:177)
	at org.ametys.plugins.skineditor.resources.AddOrUpdateFileAction.act(AddOrUpdateFileAction.java:83)
	at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:125)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:118)