'daemon has disappeared'

 I'm installing Appian for the very first time, on my laptop, and following the 'Quick Start Installation Guide for JBoss'.

When I run the config.bat script (from a command prompt as Administrator) in order to encode a JBoss password (Tools option 1) I get the following error.

Any ideas?

======================================================================
Configure Appian

This script assists with configuring Appian on various environments.
======================================================================

Repository location: C:\Program Files\appian\repo\appian
Backup location: C:\Program Files\appian\backup\appian
Registered environments: dev
JBoss location: C:\Program Files\appian\repo\appian\bin\jboss\jboss-eap-6.4

Select a tool to execute
1 - Encode passwords for use in JBoss data source configuration
B - Back
Q - Quit
> 1

Enter the password to encode for use in JBoss data source configuration
B - Back
Q - Quit
> password
The message received from the daemon indicates that the daemon has disappeared.
Build request sent: Build{id=0e48f86f-c130-479d-bdf3-be7eb366c819.1, currentDir=C:\Program Files\appian\_admin\_scripts\configure}
Attempting to read last messages from the daemon log...
Daemon pid: 2660
log file: C:\Users\simon.spencer\.gradle\daemon\4.1\daemon-2660.out.log
----- Last 20 lines from daemon log file - daemon-2660.out.log -----
15:41:34.693 [INFO] [org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler] Received command: Build{id=0e48f86f-c130-479d-bdf3-be7eb366c819.1, currentDir=C:\Program Files\appian\_admin\_scripts\configure}.
15:41:34.693 [DEBUG] [org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler] Starting executing command: Build{id=0e48f86f-c130-479d-bdf3-be7eb366c819.1, currentDir=C:\Program Files\appian\_admin\_scripts\configure} with connection: socket connection from /127.0.0.1:51838 to /127.0.0.1:51839.
15:41:34.693 [ERROR] [org.gradle.launcher.daemon.server.DaemonStateCoordinator] Command execution: started DaemonCommandExecution[command = Build{id=0e48f86f-c130-479d-bdf3-be7eb366c819.1, currentDir=C:\Program Files\appian\_admin\_scripts\configure}, connection = DefaultDaemonConnection: socket connection from /127.0.0.1:51838 to /127.0.0.1:51839] after 0.0 minutes of idle
15:41:34.693 [INFO] [org.gradle.launcher.daemon.server.DaemonRegistryUpdater] Marking the daemon as busy, address: [4ff1d279-44d3-4531-8827-df46fc763e7f port:51838, addresses:[/127.0.0.1, /0:0:0:0:0:0:0:1]]
15:41:34.693 [DEBUG] [org.gradle.launcher.daemon.registry.PersistentDaemonRegistry] Marking busy by address: [4ff1d279-44d3-4531-8827-df46fc763e7f port:51838, addresses:[/127.0.0.1, /0:0:0:0:0:0:0:1]]
15:41:34.693 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire exclusive lock on daemon addresses registry.
15:41:34.693 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
15:41:34.693 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
15:41:34.693 [DEBUG] [org.gradle.launcher.daemon.server.DaemonStateCoordinator] resetting idle timer
15:41:34.693 [DEBUG] [org.gradle.launcher.daemon.server.DaemonStateCoordinator] daemon is running. Sleeping until state changes.
15:41:34.693 [INFO] [org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy] Daemon is about to start building Build{id=0e48f86f-c130-479d-bdf3-be7eb366c819.1, currentDir=C:\Program Files\appian\_admin\_scripts\configure}. Dispatching build started information...
15:41:34.693 [DEBUG] [org.gradle.launcher.daemon.server.SynchronizedDispatchConnection] thread 18: dispatching class org.gradle.launcher.daemon.protocol.BuildStarted
15:41:34.709 [DEBUG] [org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment] Configuring env variables: {PATH=C:\Program Files\Java\jdk1.8.0_162\bin;C:\Users\simon.spencer\AppData\Local\Microsoft\WindowsApps, USERDOMAIN_ROAMINGPROFILE=APPIANCORP, PROCESSOR_LEVEL=6, ALLUSERSPROFILE=C:\ProgramData, REQUIRED_PARAMS=ae_home=../../.. ae_configure_home=., PROCESSOR_ARCHITECTURE=AMD64, PSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\windows\system32\WindowsPowerShell\v1.0\Modules, SystemDrive=C:, DIRNAME=C:\Program Files\appian\_admin\_scripts\configure\, USERNAME=simon.spencer, USERDNSDOMAIN=APPIANCORP.COM, CMD_LINE_ARGS=-q -b tasks/configure.gradle encodeSecurityDomainPassword -Ppassword=password "-PappServerDir=C:\Program Files\appian\repo\appian\bin\jboss\jboss-eap-6.4" "-PconfigureScriptHomeDir=C:\Program Files\appian\_admin\_scripts\configure", ProgramFiles(x86)=C:\Program Files (x86), APP_HOME=C:\Program Files\appian\_admin\_scripts\configure\, PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC, ProgramData=C:\ProgramData, ProgramW6432=C:\Program Files, HOMEPATH=\Users\simon.spencer, PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 78 Stepping 3, GenuineIntel, ProgramFiles=C:\Program Files, PUBLIC=C:\Users\Public, windir=C:\windows, AE_HOME_PARAM=ae_home=c:\Program Files\appian, _SKIP=2, LOCALAPPDATA=C:\Users\simon.spencer\AppData\Local, USERDOMAIN=APPIANCORP, LOGONSERVER=\\ANTEROS, JAVA_HOME=C:\Program Files\Java\jdk1.8.0_162, PROMPT=$P$G, OneDrive=C:\Users\Administrator\OneDrive, =C:=C:\Program Files\appian\_admin\_scripts\configure, APPDATA=C:\Users\simon.spencer\AppData\Roaming, JAVA_EXE=C:\Program Files\Java\jdk1.8.0_162/bin/java.exe, AE_CONFIGURE_HOME_PARAM=ae_configure_home=c:\Program Files\appian\_admin\_scripts\configure\, CommonProgramFiles=C:\Program Files\Common Files, OS=Windows_NT, COMPUTERNAME=5CG6131DKK, PROCESSOR_REVISION=4e03, CLASSPATH=C:\Program Files\appian\_admin\_scripts\configure\\gradle\wrapper\gradle-wrapper.jar, CommonProgramW6432=C:\Program Files\Common Files, ComSpec=C:\windows\system32\cmd.exe, APP_BASE_NAME=gradlew, SystemRoot=C:\windows, TEMP=C:\Users\SIMON~1.SPE\AppData\Local\Temp, HOMEDRIVE=C:, USERPROFILE=C:\Users\simon.spencer, TMP=C:\Users\SIMON~1.SPE\AppData\Local\Temp, CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files, NUMBER_OF_PROCESSORS=4}
15:41:34.724 [DEBUG] [org.gradle.launcher.daemon.server.exec.LogToClient] About to start relaying all logs to the client via the connection.
15:41:34.724 [INFO] [org.gradle.launcher.daemon.server.exec.LogToClient] The client will now receive all logging from the daemon (pid: 2660). The daemon log file: C:\Users\simon.spencer\.gradle\daemon\4.1\daemon-2660.out.log
15:41:34.724 [INFO] [org.gradle.launcher.daemon.server.exec.LogAndCheckHealth] Starting build in new daemon [memory: 954.7 MB]
15:41:34.724 [DEBUG] [org.gradle.launcher.daemon.server.exec.ExecuteBuild] The daemon has started executing the build.
15:41:34.724 [DEBUG] [org.gradle.launcher.daemon.server.exec.ExecuteBuild] Executing build with daemon context: DefaultDaemonContext[uid=a76ac607-0a79-43b0-b0a8-48b291b5c581,javaHome=C:\Program Files\Java\jdk1.8.0_162,daemonRegistryDir=C:\Users\simon.spencer\.gradle\daemon,pid=2660,idleTimeout=10800000,daemonOpts=-XX:+HeapDumpOnOutOfMemoryError,-Xmx1024m,-Dfile.encoding=windows-1252,-Duser.country=US,-Duser.language=en,-Duser.variant]
ERROR encoding the datasource password: C:\Program Files\appian\repo\appian\bin\jboss\jboss-eap-6.4\modules\system\layers\base\org\picketbox\main
Daemon vm is shutting down... The daemon has exited normally or was terminated in response to a user interrupt.
----- End of the daemon log -----

FAILURE: Build failed with an exception.

* What went wrong:
Could not dispatch a message to the daemon.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org