Using "say" command for a Sonos Player

The command

smarthome:voice say “Something”

did work on my Karaf console, however now I get

“Error executing command: org/eclipse/smarthome/core/thing/util/ThingHandlerHelper”

the log:tail shows

20:45:00.516 [ERROR] [apache.karaf.shell.support.ShellUtil] - Exception caught while executing command
java.lang.NoClassDefFoundError: org/eclipse/smarthome/core/thing/util/ThingHandlerHelper
at org.eclipse.smarthome.binding.sonos.internal.SonosAudioSink.process(SonosAudioSink.java:91)
at org.eclipse.smarthome.core.voice.internal.VoiceManagerImpl.say(VoiceManagerImpl.java:162)
at org.eclipse.smarthome.core.voice.internal.VoiceManagerImpl.say(VoiceManagerImpl.java:115)
at org.eclipse.smarthome.core.voice.internal.VoiceManagerImpl.say(VoiceManagerImpl.java:110)
at org.eclipse.smarthome.core.voice.internal.VoiceConsoleCommandExtension.say(VoiceConsoleCommandExtension.java:122)
at org.eclipse.smarthome.core.voice.internal.VoiceConsoleCommandExtension.execute(VoiceConsoleCommandExtension.java:58)
at org.eclipse.smarthome.io.console.ConsoleInterpreter.execute(ConsoleInterpreter.java:52)
at org.eclipse.smarthome.io.console.karaf.internal.CommandWrapper.execute(CommandWrapper.java:58)
at org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:67)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:87)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:480)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:406)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:182)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:119)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:94)[54:org.apache.karaf.shell.core:4.0.4]
at org.apache.karaf.shell.impl.console.ConsoleSessionImpl.run(ConsoleSessionImpl.java:270)[54:org.apache.karaf.shell.core:4.0.4]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_101]

My system settings are:
Audio
Default Source: System Microphone (I think this one isn’t needed)
Default Sink: MySonosPlayer

Voice
DefaultTest-to-Speech: VoiceRSS Text-to-Speed Engine
Default Voice: VoiceRSS -German (Germany)

Extension Voice: VoiceRSS Text-to-Speech

Nigthly build #617

Solved by updating to #627