Activation error code 3

Hi!

The problem is, that when I try to activate my rekordbox with licence key (wich I got along with my DDJ-RX) i get an error. It says "Activation error. Error code 3".

After that the program seems to work normal, but I'm not sure if it won't crash during my gig. I can't find any information about that error code. I don't know what to do, and the weekend is getting close.

I hope that someone will help me with this issue.

Greetings!