GitBucket v4.35.0 (not released yet but artifact is available on maven central) and latest version of this plugin v3.6.0 causes following error because of binary incompatibility.
11:17:02.905 [qtp42768293-15] ERROR i.g.g.l.c.LabelKanbanController - Catch unhandled error in request: Request(GET //localhost:8080/root/test/labelkanban)@4e0a2c80
java.lang.NoSuchMethodError: gitbucket.core.html.main$.apply(Ljava/lang/String;Lscala/Option;Lplay/twirl/api/Html;Lgitbucket/core/controller/Context;)Lplay/twirl/api/Html;
at labelkanban.gitbucket.html.repository$.apply(repository.template.scala:25)
at io.github.gitbucket.labelkanban.controller.labelKanbanControllerBase.$anonfun$$init$$2(LabelKanbanController.scala:88)
at gitbucket.core.util.ReferrerAuthenticator.$anonfun$authenticate$4(Authenticator.scala:95)
at scala.Option.map(Option.scala:242)
at gitbucket.core.util.ReferrerAuthenticator.authenticate(Authenticator.scala:93)
at gitbucket.core.util.ReferrerAuthenticator.referrersOnly(Authenticator.scala:87)
at gitbucket.core.util.ReferrerAuthenticator.referrersOnly$(Authenticator.scala:87)
at io.github.gitbucket.labelkanban.controller.LabelKanbanController.referrersOnly(LabelKanbanController.scala:35)
at io.github.gitbucket.labelkanban.controller.labelKanbanControllerBase.$anonfun$$init$$1(LabelKanbanController.scala:81)
at org.scalatra.ScalatraBase.liftAction(ScalatraBase.scala:282)
at org.scalatra.ScalatraBase.$anonfun$invoke$1(ScalatraBase.scala:276)
at org.scalatra.ApiFormats.withRouteMultiParams(ApiFormats.scala:180)
at org.scalatra.ApiFormats.withRouteMultiParams$(ApiFormats.scala:171)
at gitbucket.core.controller.ControllerBase.withRouteMultiParams(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.invoke(ScalatraBase.scala:275)
at org.scalatra.ScalatraBase.invoke$(ScalatraBase.scala:274)
at gitbucket.core.controller.ControllerBase.invoke(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.$anonfun$runRoutes$3(ScalatraBase.scala:250)
at scala.Option.flatMap(Option.scala:283)
at org.scalatra.ScalatraBase.$anonfun$runRoutes$1(ScalatraBase.scala:248)
at scala.collection.immutable.Stream.flatMap(Stream.scala:206)
at org.scalatra.ScalatraBase.runRoutes(ScalatraBase.scala:247)
at org.scalatra.ScalatraBase.runRoutes$(ScalatraBase.scala:245)
at gitbucket.core.controller.ControllerBase.runRoutes(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.runActions$1(ScalatraBase.scala:169)
at org.scalatra.ScalatraBase.$anonfun$executeRoutes$6(ScalatraBase.scala:181)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at org.scalatra.ScalatraBase.cradleHalt(ScalatraBase.scala:201)
at org.scalatra.ScalatraBase.executeRoutes(ScalatraBase.scala:181)
at org.scalatra.ScalatraBase.executeRoutes$(ScalatraBase.scala:150)
at gitbucket.core.controller.ControllerBase.executeRoutes(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.$anonfun$handle$1(ScalatraBase.scala:123)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.DynamicScope.withResponse(DynamicScope.scala:75)
at org.scalatra.DynamicScope.withResponse$(DynamicScope.scala:73)
at gitbucket.core.controller.ControllerBase.withResponse(ControllerBase.scala:35)
at org.scalatra.DynamicScope.$anonfun$withRequestResponse$1(DynamicScope.scala:55)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.DynamicScope.withRequest(DynamicScope.scala:66)
at org.scalatra.DynamicScope.withRequest$(DynamicScope.scala:64)
at gitbucket.core.controller.ControllerBase.withRequest(ControllerBase.scala:35)
at org.scalatra.DynamicScope.withRequestResponse(DynamicScope.scala:54)
at org.scalatra.DynamicScope.withRequestResponse$(DynamicScope.scala:52)
at gitbucket.core.controller.ControllerBase.withRequestResponse(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.handle(ScalatraBase.scala:123)
at org.scalatra.ScalatraBase.handle$(ScalatraBase.scala:119)
at gitbucket.core.controller.ControllerBase.org$scalatra$servlet$ServletBase$$super$handle(ControllerBase.scala:35)
at org.scalatra.servlet.ServletBase.handle(ServletBase.scala:42)
at org.scalatra.servlet.ServletBase.handle$(ServletBase.scala:35)
at gitbucket.core.controller.ControllerBase.org$scalatra$FlashMapSupport$$super$handle(ControllerBase.scala:35)
at org.scalatra.FlashMapSupport.$anonfun$handle$1(FlashMap.scala:197)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.DynamicScope.withRequest(DynamicScope.scala:66)
at org.scalatra.DynamicScope.withRequest$(DynamicScope.scala:64)
at gitbucket.core.controller.ControllerBase.withRequest(ControllerBase.scala:35)
at org.scalatra.FlashMapSupport.handle(FlashMap.scala:172)
at org.scalatra.FlashMapSupport.handle$(FlashMap.scala:171)
at gitbucket.core.controller.ControllerBase.handle(ControllerBase.scala:35)
at org.scalatra.ScalatraFilter.$anonfun$doFilter$1(ScalatraFilter.scala:41)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.ScalatraFilter.doFilter(ScalatraFilter.scala:41)
at org.scalatra.ScalatraFilter.doFilter$(ScalatraFilter.scala:36)
at gitbucket.core.controller.ControllerBase.doFilter(ControllerBase.scala:73)
at gitbucket.core.servlet.PluginControllerFilter.$anonfun$process$2(PluginControllerFilter.scala:39)
at gitbucket.core.servlet.PluginControllerFilter.$anonfun$process$2$adapted(PluginControllerFilter.scala:32)
at scala.collection.immutable.List.foreach(List.scala:305)
at gitbucket.core.servlet.PluginControllerFilter.process(PluginControllerFilter.scala:32)
at gitbucket.core.servlet.ControllerFilter.doFilter(CompositeScalatraFilter.scala:25)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1591)
at org.scalatra.ScalatraFilter.$anonfun$doNotFound$1(ScalatraFilter.scala:80)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at org.scalatra.ScalatraBase.$anonfun$executeRoutes$5(ScalatraBase.scala:172)
at scala.Option.getOrElse(Option.scala:201)
at org.scalatra.ScalatraBase.$anonfun$executeRoutes$3(ScalatraBase.scala:172)
at scala.Option.getOrElse(Option.scala:201)
at org.scalatra.ScalatraBase.runActions$1(ScalatraBase.scala:172)
at org.scalatra.ScalatraBase.$anonfun$executeRoutes$6(ScalatraBase.scala:181)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at org.scalatra.ScalatraBase.cradleHalt(ScalatraBase.scala:201)
at org.scalatra.ScalatraBase.executeRoutes(ScalatraBase.scala:181)
at org.scalatra.ScalatraBase.executeRoutes$(ScalatraBase.scala:150)
at gitbucket.core.controller.ControllerBase.executeRoutes(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.$anonfun$handle$1(ScalatraBase.scala:123)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.DynamicScope.withResponse(DynamicScope.scala:75)
at org.scalatra.DynamicScope.withResponse$(DynamicScope.scala:73)
at gitbucket.core.controller.ControllerBase.withResponse(ControllerBase.scala:35)
at org.scalatra.DynamicScope.$anonfun$withRequestResponse$1(DynamicScope.scala:55)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.DynamicScope.withRequest(DynamicScope.scala:66)
at org.scalatra.DynamicScope.withRequest$(DynamicScope.scala:64)
at gitbucket.core.controller.ControllerBase.withRequest(ControllerBase.scala:35)
at org.scalatra.DynamicScope.withRequestResponse(DynamicScope.scala:54)
at org.scalatra.DynamicScope.withRequestResponse$(DynamicScope.scala:52)
at gitbucket.core.controller.ControllerBase.withRequestResponse(ControllerBase.scala:35)
at org.scalatra.ScalatraBase.handle(ScalatraBase.scala:123)
at org.scalatra.ScalatraBase.handle$(ScalatraBase.scala:119)
at gitbucket.core.controller.ControllerBase.org$scalatra$servlet$ServletBase$$super$handle(ControllerBase.scala:35)
at org.scalatra.servlet.ServletBase.handle(ServletBase.scala:42)
at org.scalatra.servlet.ServletBase.handle$(ServletBase.scala:35)
at gitbucket.core.controller.ControllerBase.org$scalatra$FlashMapSupport$$super$handle(ControllerBase.scala:35)
at org.scalatra.FlashMapSupport.$anonfun$handle$1(FlashMap.scala:197)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.DynamicScope.withRequest(DynamicScope.scala:66)
at org.scalatra.DynamicScope.withRequest$(DynamicScope.scala:64)
at gitbucket.core.controller.ControllerBase.withRequest(ControllerBase.scala:35)
at org.scalatra.FlashMapSupport.handle(FlashMap.scala:172)
at org.scalatra.FlashMapSupport.handle$(FlashMap.scala:171)
at gitbucket.core.controller.ControllerBase.handle(ControllerBase.scala:35)
at org.scalatra.ScalatraFilter.$anonfun$doFilter$1(ScalatraFilter.scala:41)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
at org.scalatra.ScalatraFilter.doFilter(ScalatraFilter.scala:41)
at org.scalatra.ScalatraFilter.doFilter$(ScalatraFilter.scala:36)
at gitbucket.core.controller.ControllerBase.doFilter(ControllerBase.scala:73)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1591)
at gitbucket.core.servlet.TransactionFilter.$anonfun$doFilter$1(TransactionFilter.scala:39)
at gitbucket.core.servlet.TransactionFilter.$anonfun$doFilter$1$adapted(TransactionFilter.scala:30)
at com.github.takezoe.slick.blocking.BlockingJdbcProfile$BlockingAPI$BlockingDatabase.$anonfun$withTransaction$2(BlockingProfile.scala:207)
at slick.JdbcProfileBlockingSession$BlockingSession.withTransaction(TransactionalJdbcBackend.scala:26)
at com.github.takezoe.slick.blocking.BlockingJdbcProfile$BlockingAPI$BlockingDatabase.$anonfun$withTransaction$1(BlockingProfile.scala:207)
at com.github.takezoe.slick.blocking.BlockingJdbcProfile$BlockingAPI$BlockingDatabase.withSession(BlockingProfile.scala:200)
at com.github.takezoe.slick.blocking.BlockingJdbcProfile$BlockingAPI$BlockingDatabase.withTransaction(BlockingProfile.scala:207)
at gitbucket.core.servlet.TransactionFilter.doFilter(TransactionFilter.scala:30)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1583)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:536)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1581)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1307)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:482)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1549)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1204)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:494)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:374)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:268)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:367)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:782)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:918)
at java.lang.Thread.run(Thread.java:748)
GitBucket v4.35.0 (not released yet but artifact is available on maven central) and latest version of this plugin v3.6.0 causes following error because of binary incompatibility.