File Transfer Problems (java.lang.NullPointerException)

When attempting a file transfer between clients, I get the following:

Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException

at org.jivesoftware.sparkimpl.plugin.filetransfer.transfer.ui.ReceiveMessage.accep tFileTransfer(ReceiveMessage.java:158)

at org.jivesoftware.spark.filetransfer.SparkTransferManager.handleTransferRequest( SparkTransferManager.java:286)

at org.jivesoftware.spark.filetransfer.SparkTransferManager.access$100(SparkTransf erManager.java:112)

at org.jivesoftware.spark.filetransfer.SparkTransferManager$3$1.run(SparkTransferM anager.java:207)

at java.awt.event.InvocationEvent.dispatch(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

The builds in use are spark_2_6_0_12252.exe

This is the receiving error log, and the spark window shows “File transfer request:” but blank below that and no options to accept/reject.

Sending client shows nothing in the error log