Fatal Error after updating to 0.8.3 update 79

[Bart]

Log:

MinimServer 0.8.3 update 79, Copyright © 2012-2016 Simon Nash. All rights reserved.
MinimStreamer 0.5.23, Copyright © 2012-2016 Simon Nash. All rights reserved.
Java™ SE Embedded Runtime Environment (build 1.8.0_65-b17)
Java HotSpot™ Embedded Server VM (build 25.65-b01, mixed mode)
Platform default charset is UTF-8
java.lang.NullPointerException
at com.minimstreamer.Streamer.checkPath(Streamer.java:293)
at com.minimstreamer.Streamer.configureConverter(Streamer.java:472)
at com.minimstreamer.Streamer.doTranscodeInit(Streamer.java:253)
at com.minimstreamer.Streamer.start(Streamer.java:146)
at org.jminim.core.ContextImpl.startComponent(ContextImpl.java:167)
at com.minimserver.Server.doStart(Server.java:794)
at com.minimserver.Server.start(Server.java:456)
at org.jminim.core.ContextImpl.startComponent(ContextImpl.java:167)
at org.jminim.core.ContextImpl.start(ContextImpl.java:92)
at org.jminim.core.RootContextImpl.startComponent(RootContextImpl.java:47)
at org.jminim.core.ContextImpl.start(ContextImpl.java:92)
at org.jminim.core.RuntimeImpl.run(RuntimeImpl.java:1411)
at org.jminim.core.LauncherImpl.run(LauncherImpl.java:1106)
at org.jminim.core.LauncherImpl.launch(LauncherImpl.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.jav​a:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.jminim.launch.Launcher.doLaunch(Launcher.java:621)
at org.jminim.launch.Launcher.launch(Launcher.java:204)
at com.minimserver.launch.LaunchServer.main(LaunchServer.java:30)

(07-04-2016 03:44)Bart Wrote:  On my qnap hs-251, I updated Minimserver to update 79 today. I've not updated the qnap os recently; it is running 4.2.0 dated 2016/03/11

I consistently get a red MinimWatch icon on my Mac, with the error at startup java.lang.NullPointerException. This started happening only since updating this evening to 0.8.3 update 79.

Any ideas?