Someone know why when i try to do an exam certification, they request me 2 credits.  The page tell me to contact with the administrator 

What does mean??, I’m supposed to buy more things, in that case, where can i buy those credits

Edu ​​​​​​​3DEXPERIENCE CATIA ​​​​​​​Student Offers ​​​​​​​Certification Credits ​​​​​​​