The resource did not process correctly

java.lang.IllegalStateException: No parameter [{$root.androidDownloadUrl}] was set in the pattern [/app/{{$root.androidDownloadUrl}}]. Call address.set("{$root.androidDownloadUrl}", value); or remove the parameter from the pattern.
	at org.ocpsoft.urlbuilder.AddressResult.parameterize(AddressResult.java:185)
	at org.ocpsoft.urlbuilder.AddressResult.parameterize(AddressResult.java:156)
	at org.ocpsoft.urlbuilder.AddressResult.(AddressResult.java:65)
	at org.ocpsoft.urlbuilder.AddressBuilder.build(AddressBuilder.java:64)
	at org.ocpsoft.urlbuilder.AddressBuilderQuery.build(AddressBuilderQuery.java:37)
	at org.ocpsoft.rewrite.servlet.impl.BaseHttpRewrite.getInboundAddress(BaseHttpRewrite.java:88)
	at org.ocpsoft.rewrite.servlet.config.Path.evaluateHttp(Path.java:119)
	at org.ocpsoft.rewrite.servlet.config.HttpCondition.evaluate(HttpCondition.java:44)
	at org.ocpsoft.rewrite.config.And.evaluate(And.java:77)
	at org.ocpsoft.rewrite.config.RuleBuilder.evaluate(RuleBuilder.java:129)
	at org.ocpsoft.rewrite.config.And.evaluate(And.java:77)
	at org.ocpsoft.rewrite.config.RuleBuilder.evaluate(RuleBuilder.java:129)
	at org.ocpsoft.rewrite.servlet.impl.DefaultHttpRewriteProvider.rewriteHttp(DefaultHttpRewriteProvider.java:165)
	at org.ocpsoft.rewrite.servlet.http.HttpRewriteProvider.rewrite(HttpRewriteProvider.java:43)
	at org.ocpsoft.rewrite.servlet.RewriteFilter.rewrite(RewriteFilter.java:247)
	at org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:188)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at com.adstter.engine.web.filters.LocaleFilter.doFilter(LocaleFilter.java:73)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:578)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at com.google.apphosting.runtime.jetty9.ParseBlobUploadHandler.handle(ParseBlobUploadHandler.java:111)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
	at com.google.apphosting.runtime.jetty94.AppEngineWebAppContext.doHandle(AppEngineWebAppContext.java:234)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at com.google.apphosting.runtime.jetty94.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:256)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:516)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
	at com.google.apphosting.runtime.jetty94.RpcConnection.handle(RpcConnection.java:243)
	at com.google.apphosting.runtime.jetty94.RpcConnector.serviceRequest(RpcConnector.java:84)
	at com.google.apphosting.runtime.jetty94.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:158)
	at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest(JavaRuntime.java:837)
	at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest(JavaRuntime.java:791)
	at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:761)
	at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:260)
	at java.lang.Thread.run(Thread.java:748)