Tradfri 1.9.27 again (brightness: no handler is assigned)

Hi ,
after updating my tradfri app openhab does not switch my tradfri panel (and other bulbs).
It worked nice for two years.

I can swich the panel with the controller, but not with the paperUI or with a rule.
switching on:
PaperUI :
Brighness changes from 0 to 100,
switch Ceiling Kitchen Ground Floor changes from off to on
log:
2019-12-08 19:31:56.346 [vent.ItemStateChangedEvent] - tradfri_0220_gwdcefcaba5307_65540_brightness changed from 0 to 100

2019-12-08 19:31:56.358 [vent.ItemStateChangedEvent] - Light_GF_Kitchen_Ceiling changed from OFF to ON

switching off
PaperUI :
Brighness changes from 100 to 0,
switch Ceiling Kitchen Ground Floor changes from on to off
log:

2019-12-08 19:31:14.827 [vent.ItemStateChangedEvent] - Light_GF_Kitchen_Ceiling changed from ON to OFF

2019-12-08 19:31:14.824 [vent.ItemStateChangedEvent] - tradfri_0220_gwdcefcaba5307_65540_brightness changed from 100 to 0

Moving the paperUI switch from off to on sets the sysmbol, but

2019-12-08 19:36:59.462 [ome.event.ItemCommandEvent] - Item ‘Light_GF_Kitchen_Ceiling’ received command ON

==> /var/log/openhab2/openhab.log <==

2019-12-08 19:36:59.468 [WARN ] [nternal.profiles.ProfileCallbackImpl] - Cannot delegate command ‘ON’ for item ‘Light_GF_Kitchen_Ceiling’ to handler for channel ‘tradfri:0220:gwdcefcaba5307:65540:brightness’, because no handler is assigned. Maybe the binding is not installed or not propertly initialized.

2019-12-08 19:36:59.469 [WARN ] [nternal.profiles.ProfileCallbackImpl] - Cannot delegate update ‘ON’ for item ‘Light_GF_Kitchen_Ceiling’ to handler for channel ‘tradfri:0220:gwdcefcaba5307:65540:brightness’, because no handler is assigned. Maybe the binding is not installed or not propertly initialized.

==> /var/log/openhab2/events.log <==

2019-12-08 19:36:59.479 [vent.ItemStateChangedEvent] - Light_GF_Kitchen_Ceiling changed from OFF to ON

I updated my old binding 0.9.02017 to 178 │ Active │ 80 │ 2.5.0.201903260046 │ org.openhab.binding.tradfri

and restarted the binding with bundle:restart 178 from the openhab console.

Same error.

I restarted the tradfri- Binding from paperUI by refreshing the secure key and got a big error.

The behavior is the same as before, the tradfri- gateway sends infos about the state of the panel set by the controller to openhab, but openhab does not send messages to the tradfri-gateway.

2019-12-08 20:33:11.130 [ERROR] [alifornium.core.network.CoapEndpoint] - Exception in protocol stage thread: null

java.lang.NullPointerException: null

	at org.openhab.binding.tradfri.internal.model.TradfriDeviceData.<init>(TradfriDeviceData.java:54) [178:org.openhab.binding.tradfri:2.5.0.201903260046]

	at org.openhab.binding.tradfri.internal.model.TradfriWirelessDeviceData.<init>(TradfriWirelessDeviceData.java:34) [178:org.openhab.binding.tradfri:2.5.0.201903260046]

	at org.openhab.binding.tradfri.internal.model.TradfriControllerData.<init>(TradfriControllerData.java:27) [178:org.openhab.binding.tradfri:2.5.0.201903260046]

	at org.openhab.binding.tradfri.internal.handler.TradfriControllerHandler.onUpdate(TradfriControllerHandler.java:49) [178:org.openhab.binding.tradfri:2.5.0.201903260046]

	at org.openhab.binding.tradfri.internal.TradfriCoapHandler.onLoad(TradfriCoapHandler.java:65) [178:org.openhab.binding.tradfri:2.5.0.201903260046]

	at org.eclipse.californium.core.CoapClient$ObserveMessageObserverImpl.deliver(CoapClient.java:1067) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.CoapClient$MessageObserverImpl.succeeded(CoapClient.java:995) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.CoapClient$MessageObserverImpl.onResponse(CoapClient.java:974) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.coap.Request.setResponse(Request.java:509) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.EndpointManager$ClientMessageDeliverer.deliverResponse(EndpointManager.java:267) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.CoapStack$StackTopAdapter.receiveResponse(CoapStack.java:193) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.ObserveLayer.receiveResponse(ObserveLayer.java:137) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.BlockwiseLayer.receiveResponse(BlockwiseLayer.java:321) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.ReliabilityLayer.receiveResponse(ReliabilityLayer.java:269) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.CoapStack.receiveResponse(CoapStack.java:135) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$InboxImpl.receiveMessage(CoapEndpoint.java:656) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$InboxImpl.access$700(CoapEndpoint.java:562) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$InboxImpl$1.run(CoapEndpoint.java:574) [174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$5.run(CoapEndpoint.java:721) [174:californium-osgi:1.0.6]

	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]

	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]

	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:?]

	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:?]

	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:745) [?:?]

2019-12-08 20:33:11.227 [ERROR] [alifornium.core.network.CoapEndpoint] - Exception in protocol stage thread: org.eclipse.smarthome.core.library.types.HSBType.fromXY(FF)Lorg/eclipse/smarthome/core/library/types/HSBType;

java.lang.NoSuchMethodError: org.eclipse.smarthome.core.library.types.HSBType.fromXY(FF)Lorg/eclipse/smarthome/core/library/types/HSBType;

	at org.openhab.binding.tradfri.internal.TradfriColor.getHSB(TradfriColor.java:87) ~[?:?]

	at org.openhab.binding.tradfri.internal.model.TradfriLightData.getColor(TradfriLightData.java:113) ~[?:?]

	at org.openhab.binding.tradfri.internal.handler.TradfriLightHandler.onUpdate(TradfriLightHandler.java:81) ~[?:?]

	at org.openhab.binding.tradfri.internal.TradfriCoapHandler.onLoad(TradfriCoapHandler.java:65) ~[?:?]

	at org.eclipse.californium.core.CoapClient$ObserveMessageObserverImpl.deliver(CoapClient.java:1067) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.CoapClient$MessageObserverImpl.succeeded(CoapClient.java:995) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.CoapClient$MessageObserverImpl.onResponse(CoapClient.java:974) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.coap.Request.setResponse(Request.java:509) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.EndpointManager$ClientMessageDeliverer.deliverResponse(EndpointManager.java:267) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.CoapStack$StackTopAdapter.receiveResponse(CoapStack.java:193) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.ObserveLayer.receiveResponse(ObserveLayer.java:137) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.BlockwiseLayer.receiveResponse(BlockwiseLayer.java:321) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.ReliabilityLayer.receiveResponse(ReliabilityLayer.java:269) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.AbstractLayer.receiveResponse(AbstractLayer.java:98) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.stack.CoapStack.receiveResponse(CoapStack.java:135) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$InboxImpl.receiveMessage(CoapEndpoint.java:656) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$InboxImpl.access$700(CoapEndpoint.java:562) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$InboxImpl$1.run(CoapEndpoint.java:574) ~[174:californium-osgi:1.0.6]

	at org.eclipse.californium.core.network.CoapEndpoint$5.run(CoapEndpoint.java:721) [174:californium-osgi:1.0.6]

	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]

	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]

	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:?]

	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:?]

	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:745) [?:?]


any sugesstions?