Openfire 3.10.0 RC + ofmeet 0.1.4

Getting Error internal application error[SetRemoteDiscription] while using ofmeet

stderror.log:

WARNING: Received presence for non-existing member: zhul

stdoutt.log:

INTERPRETED:

INTERPRETED:

warn.log:

2017.09.15 10:15:39 org.jivesoftware.openfire.IQRouter - Error or result packet could not be delivered

2017.09.15 10:33:57 org.jivesoftware.openfire.IQRouter - Error or result packet could not be delivered

2017.09.15 11:17:10 org.jivesoftware.openfire.session.LocalOutgoingServerSession - Error trying to connect to remote server: null(DNS lookup: null:5269): java.net.UnknownHostException: null

2017.09.15 11:17:10 org.jivesoftware.openfire.session.LocalOutgoingServerSession - Fail to connect to null for sec.zz

2017.09.15 11:36:12 org.jivesoftware.util.log.util.CommonsLogFactory - #0001 was active for 320075 milliseconds and has been removed automaticaly. The Thread responsible was named ‘C2S-Thread-1’, but the last SQL it performed is unknown because the trace property is not enabled.

2017.09.15 11:36:12 org.jivesoftware.util.log.util.CommonsLogFactory - #0002 was active for 328359 milliseconds and has been removed automaticaly. The Thread responsible was named ‘C2S-Thread-1’, but the last SQL it performed is unknown because the trace property is not enabled.

2017.09.15 11:36:12 org.jivesoftware.util.log.util.CommonsLogFactory - #0003 was active for 328363 milliseconds and has been removed automaticaly. The Thread responsible was named ‘C2S-Thread-1’, but the last SQL it performed is unknown because the trace property is not enabled.

2017.09.15 11:36:12 org.jivesoftware.util.log.util.CommonsLogFactory - #0005 was active for 320085 milliseconds and has been removed automaticaly. The Thread responsible was named ‘C2S-Thread-1’, but the last SQL it performed is unknown because the trace property is not enabled.

Please enlighten.

Thanks very much.