Installing WHC locally on existing windchill fails and no WHC folder created on Windchill with IIS environment

• Installing WHC locally  on existing windchill fails and no WHC folder created  on  Windchill with IIS server machine 
• The installation fails  with the following error messages in PTCSOLNINSTALLER_PtcInstall.log  :

- ################################################### 
-          Running whc Installer 
- ################################################### 
- running whc from location = D:\Software\MED-61006-CD-121_12-1-2-4_12-1-2-4-Bundle\windchill_12.1.2.1_help_center 
- Processing subinstaller assembly (whc): timer.start 
- getting variable (WC_PROMPTED.ig.coreproductSettings.webAppContextRoot) = (Windchill) 
- failed to install (whc) 
ERROR  02-05-2024 13:18:59 - failsOnError=false, so not failing the overall install. 
ERROR  02-05-2024 13:18:59 - error details: 
java.lang.NullPointerException: null
at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011) ~[?:?]
at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006) ~[?:?]
at java.util.Properties.put(Properties.java:1329) ~[?:?]
at java.util.Properties.setProperty(Properties.java:229) ~[?:?]
at com.ptc.windchill.install.psi.ctl.product.WhcInputs.getProperties(WhcInputs.java:119) ~[Execute.zip:?]
at com.ptc.windchill.install.psi.ctl.product.PsiInputPropertyWriter.writePropertyFile(PsiInputPropertyWriter.java:34) ~[Execute.zip:?]
at com.ptc.windchill.install.suite.subinstaller.installers.WhcMedInstaller.outputProperties(WhcMedInstaller.java:33) ~[Execute.zip:?]
at com.ptc.windchill.install.suite.subinstaller.AbstractLightweightSubinstaller.run(AbstractLightweightSubinstaller.java:136) ~[Execute.zip:?]
at com.ptc.windchill.install.suite.SubInstallerManagerImpl.executeInstaller(SubInstallerManagerImpl.java:1204) ~[Execute.zip:?]
at com.ptc.windchill.install.suite.SubInstallerManagerImpl.process(SubInstallerManagerImpl.java:449) ~[Execute.zip:?]
at com.ptc.windchill.install.suite.SubInstallerManager.process(SubInstallerManager.java:24) ~[Execute.zip:?]
at com.ptc.windchill.install.framework.InstallAction.run(InstallAction.java:512) ~[Execute.zip:?]
at com.ptc.windchill.install.framework.InstallAction.install(InstallAction.java:330) ~[Execute.zip:?]
at com.zerog.ia.installer.actions.CustomAction.installSelf(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.InstallablePiece.install(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.InstallablePiece.install(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.InstallablePiece.install(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.GhostDirectory.install(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.InstallablePiece.install(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.Installer.install(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.actions.InstallProgressAction.ae(Unknown Source) ~[IAClasses.zip:?]
at com.zerog.ia.installer.actions.ProgressPanelAction$1.run(Unknown Source) ~[IAClasses.zip:?]
- Setting variable PSI_INSTALL_SUCCESS=FATAL_ERROR. 
- Processing subinstaller assembly (whc): timer.stop. Elapsed time = 00:00:00 -- 0 sec 
 - SubinstallerManager - finished with assembly: whc 
- SubinstallerManager - starting assembly: odata