Mostly these Java errors indicate conflicting JAR files, so very valuable you share these. I suspect org.apache.poi.poi-ooxml-5.2.2.jar and org.apache.poi.poi-ooxml-4.1.2.jar are conflicting. Could you delete the latter file, clean deployment directory and try again?
Please verify if your Excel export also still works, as the XLSReport module seems to use the old version I asked you to delete.
Here my jar files