Why I cannot preview report in export RCP?

peonest

Dear all,

In my exported RCP, I create a new report, configure the datasource and dataset, and drag the dataset to the report as a table. But when I preview it, it shows the following error. Any one met this before? And any suggestions will be appreciated! Thanks!

HTTP ERROR: 500
Could not initialize class org.apache.axis.utils.XMLUtils
RequestURI=/viewer/run

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