kettl的spoon报错，为什么抱着个错，这个是把大文本用get data from XML解析分类时报错

org.dom4j.DocumentException: Error on line 2 of document : cvc-elt.1: Cannot find the declaration of element 'DocumentElement'. Nested exception: cvc-elt.1: Cannot find the declaration of element 'DocumentElement'.

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