Cannot use paperUI when OH2 started from Eclipse IDE

I try running OH2 from the Eclipse IDE. I use `the default run configuration in which all target platform run configurations are selected, plus one new binding from the workspace. When I try using PaperUI, the UI comes up, but as soon as I try to do something, it gives an error 403, Forbidden. Here is what I see in the log file:

2017-03-07 13:01:11.173 [DEBUG] [r.JSONResponse$ExceptionMapper:160 ] - exception during REST Handlingjavax.ws.rs.ForbiddenException: User not authorized. at org.glassfish.jersey.server.filter.RolesAllowedDynamicFeature$RolesAllowedRequestFilter.filter(RolesAllowedDynamicFeature.java:139) at org.glassfish.jersey.server.ContainerFilteringStage.apply(ContainerFilteringStage.java:132) at org.glassfish.jersey.server.ContainerFilteringStage.apply(ContainerFilteringStage.java:68) at org.glassfish.jersey.process.internal.Stages.process(Stages.java:197) at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:318) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)

Does anyone have an idea what the problem could be?