Hello,
I was modifying some items/models using the OH3 settings admin UI interface and I guess something went wrong and now neither the Model or Items areas of the web interface will load. I’ve cleared OH cache and have rebooted with no change or improvement. Here is what I see:
And here is what my browser’s developer console shows:
And finally, my openhab.log file is giving me the following:
2022-05-27 09:38:21.252 [ERROR] [rg.apache.cxf.jaxrs.utils.JAXRSUtils] - Problem with writing the data, class org.openhab.core.io.rest.Stream2JSONInputStream, ContentType: application/json
2022-05-27 09:38:21.253 [ERROR] [internal.JSONResponseExceptionMapper] - Unexpected exception occurred while processing REST request.
java.lang.ClassCastException: class org.smarthomej.binding.amazonechocontrol.internal.handler.AccountHandler cannot be cast to class org.openhab.binding.amazonechocontrol.internal.handler.AccountHandler (org.smarthomej.binding.amazonechocontrol.internal.handler.AccountHandler is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @3f29fe78; org.openhab.binding.amazonechocontrol.internal.handler.AccountHandler is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @65acf545)
at org.openhab.binding.amazonechocontrol.internal.AmazonEchoDynamicStateDescriptionProvider.findHandler(AmazonEchoDynamicStateDescriptionProvider.java:77) ~[?:?]
at org.openhab.binding.amazonechocontrol.internal.AmazonEchoDynamicStateDescriptionProvider.getStateDescription(AmazonEchoDynamicStateDescriptionProvider.java:224) ~[?:?]
at org.openhab.core.thing.internal.ChannelStateDescriptionProvider.getDynamicStateDescription(ChannelStateDescriptionProvider.java:135) ~[?:?]
at org.openhab.core.thing.internal.ChannelStateDescriptionProvider.getStateDescription(ChannelStateDescriptionProvider.java:120) ~[?:?]
at org.openhab.core.thing.internal.ChannelStateDescriptionProvider.getStateDescriptionFragment(ChannelStateDescriptionProvider.java:86) ~[?:?]
at org.openhab.core.internal.service.StateDescriptionServiceImpl.getMergedStateDescriptionFragments(StateDescriptionServiceImpl.java:71) ~[?:?]
at org.openhab.core.internal.service.StateDescriptionServiceImpl.getStateDescription(StateDescriptionServiceImpl.java:63) ~[?:?]
at org.openhab.core.items.GenericItem.getStateDescription(GenericItem.java:409) ~[?:?]
at org.openhab.core.io.rest.core.item.EnrichedItemDTOMapper.considerTransformation(EnrichedItemDTOMapper.java:126) ~[?:?]
at org.openhab.core.io.rest.core.item.EnrichedItemDTOMapper.map(EnrichedItemDTOMapper.java:68) ~[?:?]
at org.openhab.core.io.rest.core.item.EnrichedItemDTOMapper.map(EnrichedItemDTOMapper.java:62) ~[?:?]
at org.openhab.core.io.rest.core.internal.item.ItemResource.lambda$2(ItemResource.java:215) ~[?:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) ~[?:?]
at java.util.HashMap$KeySpliterator.tryAdvance(HashMap.java:1642) ~[?:?]
at java.util.stream.StreamSpliterators$WrappingSpliterator.lambda$initPartialTraversalState$0(StreamSpliterators.java:294) ~[?:?]
at java.util.stream.StreamSpliterators$AbstractWrappingSpliterator.fillBuffer(StreamSpliterators.java:206) ~[?:?]
at java.util.stream.StreamSpliterators$AbstractWrappingSpliterator.doAdvance(StreamSpliterators.java:169) ~[?:?]
at java.util.stream.StreamSpliterators$WrappingSpliterator.tryAdvance(StreamSpliterators.java:300) ~[?:?]
at java.util.Spliterators$1Adapter.hasNext(Spliterators.java:681) ~[?:?]
at org.openhab.core.io.rest.Stream2JSONInputStream.fillBuffer(Stream2JSONInputStream.java:94) ~[?:?]
at org.openhab.core.io.rest.Stream2JSONInputStream.read(Stream2JSONInputStream.java:70) ~[?:?]
at java.io.InputStream.read(InputStream.java:280) ~[?:?]
at java.io.InputStream.transferTo(InputStream.java:704) ~[?:?]
at org.openhab.core.io.rest.core.internal.GsonMessageBodyWriter.writeTo(GsonMessageBodyWriter.java:84) ~[?:?]
at org.openhab.core.io.rest.core.internal.MediaTypeExtension.writeTo(MediaTypeExtension.java:84) ~[?:?]
at org.apache.cxf.jaxrs.utils.JAXRSUtils.writeMessageBody(JAXRSUtils.java:1543) ~[bundleFile:3.4.5]
at org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor.serializeMessage(JAXRSOutInterceptor.java:249) ~[bundleFile:3.4.5]
at org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor.processResponse(JAXRSOutInterceptor.java:122) ~[bundleFile:3.4.5]
at org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor.handleMessage(JAXRSOutInterceptor.java:84) ~[bundleFile:3.4.5]
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) ~[bundleFile:3.4.5]
at org.apache.cxf.interceptor.OutgoingChainInterceptor.handleMessage(OutgoingChainInterceptor.java:90) ~[bundleFile:3.4.5]
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:265) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:225) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:298) ~[bundleFile:3.4.5]
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:222) ~[bundleFile:3.4.5]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) ~[bundleFile:3.1.0]
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:273) ~[bundleFile:3.4.5]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:550) ~[bundleFile:9.4.43.v20210629]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71) ~[bundleFile:?]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434) ~[bundleFile:9.4.43.v20210629]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:294) ~[bundleFile:?]
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) ~[bundleFile:9.4.43.v20210629]
at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:82) ~[bundleFile:?]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.Server.handle(Server.java:516) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388) ~[bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:386) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883) [bundleFile:9.4.43.v20210629]
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034) [bundleFile:9.4.43.v20210629]
at java.lang.Thread.run(Thread.java:829) [?:?]
How do I go about fixing this? 
Thank you for your help!
* OS: Windows 11 Pro 21H2 1000.22000.675.0
* Java Runtime Environment: Zulu11.56.19-ca-jdk11.0.15-win_x64
* openHAB version: 3.3.0.M5 - Milestone Build
