Issue with GINA

We're noticing that some of our computers' GINA is working and some are not. On the ones not working, when you click the reset / unlock link under the password prompt, it does nothing. It adds a APPCrash event in the app event log.

Looking at ADSelfServicePlusClient.log, I can definitely see the issue. Where is it pulling defUser? See these lines:

A good working GINA results:

http://password.company.org:80/AgentStatusUpdate.cc?status=adssp_admin_gina_install_success&machineName=PC13444&domainName=TEST.lan&version=4.2.4&defUser=TEST\joe.schmoe&directory=C:\Program Files (x86)\ZOHO Corp\ADSelfService Plus Client Software\

A bad working GINA results:

http://password.company:80/AgentStatusUpdate.cc?status=adssp_admin_gina_install_success&machineName=PC13408&domainName=TEST.lan&version=4.2.4&defUser=Ä4

Note that the bad GINA has nothing relevant after defUser.

Any chance on where we might go to resolve this?

Thanks