Cannot access BasicUI or classicUI

Hi hoping someone can help - trying to access my UIs from a browser I get a server error.

Log shows this:

2017-01-29 12:58:01.464 [WARN ] [eclipse.jetty.servlet.ServletHandler] - /basicui/app
java.lang.NullPointerException
at org.eclipse.smarthome.core.internal.items.ItemRegistryImpl.get(ItemRegistryImpl.java:158)[97:org.eclipse.smarthome.core:0.9.0.201612221226]
at org.eclipse.smarthome.core.internal.items.ItemRegistryImpl.getItem(ItemRegistryImpl.java:146)[97:org.eclipse.smarthome.core:0.9.0.201612221226]
at org.eclipse.smarthome.ui.internal.items.ItemUIRegistryImpl.getItem(ItemUIRegistryImpl.java:609)[135:org.eclipse.smarthome.ui:0.9.0.201612221226]
at org.eclipse.smarthome.ui.basic.internal.render.SwitchRenderer.renderWidget(SwitchRenderer.java:57)[179:org.eclipse.smarthome.ui.basic:0.9.0.201612221226]
at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.renderWidget(PageRenderer.java:166)[179:org.eclipse.smarthome.ui.basic:0.9.0.201612221226]
at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.processChildren(PageRenderer.java:128)[179:org.eclipse.smarthome.ui.basic:0.9.0.201612221226]
at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.processChildren(PageRenderer.java:149)[179:org.eclipse.smarthome.ui.basic:0.9.0.201612221226]
at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.processPage(PageRenderer.java:92)[179:org.eclipse.smarthome.ui.basic:0.9.0.201612221226]
at org.eclipse.smarthome.ui.basic.internal.servlet.WebAppServlet.service(WebAppServlet.java:150)[179:org.eclipse.smarthome.ui.basic:0.9.0.201612221226]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)[80:org.eclipse.jetty.servlet:9.2.19.v20160908]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)[80:org.eclipse.jetty.servlet:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71)[171:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)[78:org.eclipse.jetty.security:9.2.19.v20160908]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:287)[171:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)[80:org.eclipse.jetty.servlet:9.2.19.v20160908]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80)[171:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.Server.handle(Server.java:499)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)[79:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)[71:org.eclipse.jetty.io:9.2.19.v20160908]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)[82:org.eclipse.jetty.util:9.2.19.v20160908]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)[82:org.eclipse.jetty.util:9.2.19.v20160908]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_111]

Can anyone help how I can troubleshoot this?

Thanks

Is it perhaps the same as I had? A few hours before your post…