Excel Importer Critical Error in Mx7.6

I just upgraded to 7.6 and get the following Critical Error when the StartImportByTemplate java action executes.

I have upgraded both Excel Importer and Excel Exporter to the newest versions in the app store.

Any help appreciated.

Error in execution of monitored action '{"name":"ProductsServices.IVK_ImportSearchList","type":"Microflow"}' (execution id: 005a231c-fadd-44e4-ad45-7ebda266dc4b, execution type: CLIENT_ASYNC_MONITORED)

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java.lang.NoSuchMethodError: org.apache.poi.util.POILogger.log(ILjava/lang/Object;Ljava/lang/Throwable;)V
	at org.apache.poi.util.DocumentHelper.trySetXercesSecurityManager(DocumentHelper.java:81)
	at org.apache.poi.util.DocumentHelper.<clinit>(DocumentHelper.java:57)
	at org.apache.poi.openxml4j.opc.internal.ContentTypeManager.parseContentTypesFile(ContentTypeManager.java:373)
	at org.apache.poi.openxml4j.opc.internal.ContentTypeManager.<init>(ContentTypeManager.java:102)
	at org.apache.poi.openxml4j.opc.internal.ZipContentTypeManager.<init>(ZipContentTypeManager.java:54)
	at org.apache.poi.openxml4j.opc.ZipPackage.getPartsImpl(ZipPackage.java:192)
	at org.apache.poi.openxml4j.opc.OPCPackage.getParts(OPCPackage.java:673)
	at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:226)
	at excelimporter.reader.readers.ExcelXLSXDataReader.readData(ExcelXLSXDataReader.java:27)
	at excelimporter.reader.readers.ExcelReader.importData(ExcelReader.java:443)
	at excelimporter.reader.ExcelImporter.startImport(ExcelImporter.java:120)
	at excelimporter.actions.StartImportByTemplate.executeAction(StartImportByTemplate.java:54)
	at excelimporter.actions.StartImportByTemplate.executeAction(StartImportByTemplate.java:25)
	at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:50)
	at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:76)
	at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:55)
	at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:51)
	at com.mendix.basis.actionmanagement.ActionManager$1.execute(ActionManager.java:186)
	at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:33)
	at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.java:191)
	at com.mendix.basis.component.InternalCore.execute(InternalCore.java:577)
	at com.mendix.modules.microflowengine.actions.actioncall.JavaAction.execute(JavaAction.scala:60)
	at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47)
	at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:200)
	at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:157)
	at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:50)
	at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:76)
	at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:55)
	at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:51)
	at com.mendix.basis.actionmanagement.DefaultActionMonitor$$anonfun$run$1.apply(CustomMonitoredAction.scala:18)
	at com.mendix.basis.actionmanagement.IMonitoredAction$$anon$1.execute(IMonitoredAction.scala:47)
	at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:33)
	at com.mendix.basis.actionmanagement.IMonitoredAction$class.monitor(IMonitoredAction.scala:49)
	at com.mendix.basis.actionmanagement.CustomMonitoredAction.monitor(CustomMonitoredAction.scala:22)
	at com.mendix.basis.actionmanagement.DefaultActionMonitor$.run(CustomMonitoredAction.scala:18)
	at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.runMonitoredAction(CoreActionHandlerImpl.scala:65)
	at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:53)
	at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:51)
	at com.mendix.basis.actionmanagement.AsyncExecution$AsyncCallableWrapper$$anonfun$2.apply(AsyncExecution.scala:33)
	at scala.util.Try$.apply(Try.scala:192)
	at com.mendix.basis.actionmanagement.AsyncExecution$AsyncCallableWrapper.call(AsyncExecution.scala:32)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)