Trying to install the latest version of the WEb UI but getting the following errors;

Installer User Interface Mode Not Supported
Unable to load and to prepare the installer in console or silent mode.

In . ./install/console_stderr i see the following

XMLScriptReader: unable to parse the provided script file.  File may have been invalid...
java.lang.NullPointerException
.at Flexeraan8.am(Unknown Source)
.at Flexeraan8.ak(Unknown Source)
.at Flexeraan8$1.aa(Unknown Source)
.at Flexeraair.ad(Unknown Source)
.at Flexeraan8.ac(Unknown Source)
.at com.zerog.ia.installer.LifeCycleManager.b1(Unknown Source)
.at com.zerog.ia.installer.LifeCycleManager.a8(Unknown Source)
.at com.zerog.ia.installer.LifeCycleManager.au(Unknown Source)
.at com.zerog.ia.installer.LifeCycleManager.consoleInstallMain(Unknown Source)
.at com.zerog.ia.installer.LifeCycleManager.executeApplication(Unknown Source)
.at com.zerog.ia.installer.Main.main(Unknown Source)
.at install.main(Unknown Source)
Unable to load the script.
SHUTDOWN REQUESTED
System's temporary directory = /lpp/work1/MH
Exiting with exit code: 2000

Release : 14.0

Component : CA Vantage Storage Resource Manager

The problem comes from the OMVS profile environment.

After modifying the profile environment into OMVS by resetting the DISPLAY variable to null and adding the JAVA option with IBM_JAVA_OPTIONS=-Xms1024m -Xmx1024m, the installation will start and be successful.
The Web Client connects and gets access to the Host.