Same issue, can join but no audio or video.
Running Openfire 4.1.5
Openfire Meetings 0.9.1
2017.08.04 18:50:58 net.java.sip.communicator.util.UtilActivator - An uncaught exception occurred in thread=Thread[org.jitsi.videobridge.SctpConnection-pool-13669-thread-5,5,main] and message was: Could not initialize class org.jitsi.sctp4j.Sctp
java.lang.NoClassDefFoundError: Could not initialize class org.jitsi.sctp4j.Sctp
at org.jitsi.videobridge.SctpConnection$1.run(SctpConnection.java:476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
2017.08.04 18:50:58 net.java.sip.communicator.util.UtilActivator - An uncaught exception occurred in thread=Thread[org.jitsi.videobridge.SctpConnection-pool-13669-thread-6,5,main] and message was: Could not initialize class org.jitsi.sctp4j.Sctp
java.lang.NoClassDefFoundError: Could not initialize class org.jitsi.sctp4j.Sctp
at org.jitsi.videobridge.SctpConnection$1.run(SctpConnection.java:476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
WARN
2017.08.04 18:52:28 org.jitsi.videobridge.EndpointMessageTransport - SCTP connection with user-79fd11 not ready yet.
2017.08.04 18:52:28 org.jitsi.videobridge.EndpointMessageTransport - No available transport channel, can’t send a message