I'm sorry, but you have encountered a bug or missing nice display of an error message in the application. If you can't guess the problem from the error message, please contact Hans-Peter Störr (www.stoerr.net ) with a copy of this page, or open an issue on https://github.com/stoerr/GrokConstructor/issues .
Please remember that you can always press the back button (and probably do a form resubmission) to fix what was wrong - there is no state on the server, only in the page shown in the browser.
Error message: scala.MatchError: /match. (of class java.lang.String) Time: Thu Jan 02 17:18:10 UTC 2025 RequestId: null Request Info: ReqInfo for 6776ca5200ff02564eb46c407d0001737e67726f6b636f6e7374727563746f720001313000010107 : { "_url":"/do/match." } scala.MatchError: /match. (of class java.lang.String) at net.stoerr.grokconstructor.webframework.WebDispatcher.giveView(WebDispatcher.scala:119) at net.stoerr.grokconstructor.webframework.WebDispatcher.doGet(WebDispatcher.scala:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1459) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799) at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656) at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:78) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:571) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at com.google.apphosting.runtime.jetty9.ParseBlobUploadHandler.handle(ParseBlobUploadHandler.java:125) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440) at com.google.apphosting.runtime.jetty9.AppEngineWebAppContext.doHandle(AppEngineWebAppContext.java:289) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at com.google.apphosting.runtime.jetty9.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:112) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.Server.handle(Server.java:516) at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479) at com.google.apphosting.runtime.jetty9.RpcConnection.handle(RpcConnection.java:269) at com.google.apphosting.runtime.jetty9.RpcConnector.serviceRequest(RpcConnector.java:100) at com.google.apphosting.runtime.jetty9.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:227) at com.google.apphosting.runtime.RequestRunner.dispatchServletRequest(RequestRunner.java:349) at com.google.apphosting.runtime.RequestRunner.dispatchRequest(RequestRunner.java:234) at com.google.apphosting.runtime.RequestRunner.run(RequestRunner.java:200) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:273) at java.lang.Thread.run(Thread.java:750)