NNMI 2023.05 installation fails at prerequisites Phase II

Hi

customer is installing NNMi 2023.05 on RedHat 8.10. With a strange error " NNM is not a valid productName" : 

Preinstall Check (phase II)
Initialize action for com.hp.ov.installer.ovapp.core.ActionRunner@2429d064
Dec 02, 2024 4:38:18 AM az b
INFO: [com.hp.autopassj.services.crypto.CipherFactory : Cipher initialization.] :: Crypto provider currently in use 'SunJCE'.
Dec 02, 2024 4:38:18 AM com.hp.autopassj.services.logger.Logger info
INFO: [com.hp.autopassj.core.config.ConfigurationManager : configureAutopassJ] :: AutopassJ not on cloud.
Dec 02, 2024 4:38:18 AM com.hp.autopassj.services.logger.Logger info
INFO: [com.hp.autopassj.core.config.ConfigurationManager : configureAutopassJ] :: AutopassJ deployment type is : On-Premise 
Dec 02, 2024 4:38:18 AM  
INFO: Error: NNM is not a valid productName.

 Exception in thread "main" java.lang.RuntimeException: com.hp.ov.nms.autopass.controller.NmsAutopassException
  at com.hp.ov.nms.preinstall.NmsAutopassLicenseManagerFactory.createInstance(NmsAutopassLicenseManagerFactory.java:33)
  at com.hp.ov.nms.preinstall.NmsAutopassLicenseManagerFactory.create(NmsAutopassLicenseManagerFactory.java:21)
  at com.hp.ov.nms.preinstall.LicenseValidatorImpl.<init>(LicenseValidatorImpl.java:31)


Customer is 100% sure that all NNMI installation prerequisites are OK, necessary packages are installed.
Have you seen it before? Any idea what it means and what could be a cause of the problem?

thank you in advance,
Gedas