Problems with TA_E_ACTIVATE errorAnswered

Hello, 

We have an older app which uses TurboActivate for licensing, but recently a new error appeared.

If the user runs the app as a regular user, they get TA_E_ACTIVATE error.

If they run it as an Administrator, it runs fine.

Do you have an idea what could be causing the error?

Thank you for any ideas.

Best regards,

Maria