Starting pull request builds failed when bitbucket repository is defined using SSH. The error is below:

Root cause:

java.lang.IllegalArgumentException
     at com.google.common.base.Preconditions.checkArgument(Preconditions.java:76)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository.getRepoSlug(BitBucketCloudRepository.java:161)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository$$EnhancerByCGLIB$$d65c6792.CGLIB$getRepoSlug$6(<generated>)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository$$EnhancerByCGLIB$$d65c6792$$FastClassByCGLIB$$c05af1fd.invoke(<generated>)
     at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
     at com.pmease.quickbuild.DefaultScriptEngine$Interpolator.intercept(DefaultScriptEngine.java:261)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository$$EnhancerByCGLIB$$d65c6792.getRepoSlug(<generated>)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.pulls.PullRequestsWithStateProvider.getPullRequests(PullRequestsWithStateProvider.java:46)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.pulls.PullRequestsWithStateProvider$$EnhancerByCGLIB$$545dfa59.CGLIB$getPullRequests$1(<generated>)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.pulls.PullRequestsWithStateProvider$$EnhancerByCGLIB$$545dfa59$$FastClassByCGLIB$$730254db.invoke(<generated>)
     at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
     at com.pmease.quickbuild.DefaultScriptEngine$Interpolator.intercept(DefaultScriptEngine.java:261)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.pulls.PullRequestsWithStateProvider$$EnhancerByCGLIB$$545dfa59.getPullRequests(<generated>)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository.getShortBranches(BitBucketCloudRepository.java:172)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository$$EnhancerByCGLIB$$d65c6792.CGLIB$getShortBranches$7(<generated>)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository$$EnhancerByCGLIB$$d65c6792$$FastClassByCGLIB$$c05af1fd.invoke(<generated>)
     at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:215)
     at com.pmease.quickbuild.DefaultScriptEngine$Interpolator.intercept(DefaultScriptEngine.java:261)
     at com.pmease.quickbuild.plugin.scm.bitbucketcloud.BitBucketCloudRepository$$EnhancerByCGLIB$$d65c6792.getShortBranches(<generated>)
     at com.pmease.quickbuild.DefaultBuildEngine.requestBuild(DefaultBuildEngine.java:1832)
     at com.pmease.quickbuild.DefaultBuildEngine.requestBuild(DefaultBuildEngine.java:1742)
     at com.pmease.quickbuild.web.component.configuration.ConfigurationTreeView$6$1.onClick(ConfigurationTreeView.java:341)
     at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:187)
     at java.lang.reflect.Method.invoke(Method.java:498)
     at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:272)
     at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:220)
     at org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:179)
     at org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:165)
     at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:719)
     at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
     at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
     at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:253)
     at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
     at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:137)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
     at com.pmease.quickbuild.web.MainServlet.service(MainServlet.java:135)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
     at org.eclipse.equinox.http.helper.FilterServletAdaptor$FilterChainImpl.doFilter(FilterServletAdaptor.java:56)
     at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:83)
     at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:365)
     at org.eclipse.equinox.http.helper.FilterServletAdaptor.service(FilterServletAdaptor.java:37)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
     at com.pmease.quickbuild.Quickbuild$DisableTraceFilter.doFilter(Quickbuild.java:1139)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
     at org.eclipse.jetty.server.Server.handle(Server.java:499)
     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
     at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:258)
     at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
     at java.lang.Thread.run(Thread.java:748)