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java.lang.IllegalArgumentException: Empty key at javax.crypto.spec.SecretKeySpec.<init>(SecretKeySpec.java:96) at fr.brouillard.oss.security.xhub.XHub.generateXHubToken(XHub.java:83) at fr.brouillard.oss.security.xhub.XHub.generateHeaderXHubToken(XHub.java:76) at gitbucket.core.service.WebHookService$class.gitbucket$core$service$WebHookService$class$$$anonfun$26(WebHookService.scala:123) at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) at scala.concurrent.impl.ExecutionContextImpl$AdaptedForkJoinTask.exec(ExecutionContextImpl.scala:121) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)