Warlock – “Expansion” [4th campaign, 2nd mission]

Thank you for your help, I figured it out. The key is pink, and the gate is also pink, so the key worked without any problems.

This is what I received in a private message (I hope Krivol doesn't mind)!

So, Admin and I have licensed versions and different keys, while others have pirated versions and...)))
What is going on?
Admin, you're an expert! How is that possible?