Can't active when from CE to Enterprise Trial

Hi, I have my UiPATH CE version expired. So I uninstal this one and install Enterprise Trial version.

But I tried active by offline using active code, it always saied “subscription expired”.

I also asked several of my collegures to apply for Enterprise Trial version using their company mail address too. but same issue with me when they did install job and tried active job.

What’s wrong? if they are new users, they should have access to active.

Another thing, our active code are same.

Could you please help?