The registration period for the course you are interested in has probably not yet started or has already ended.
To check the registration opening and closing dates, please visit the "Supplementary Activities" section of the www.unibocconi.it/itec website.
If the registration period is open but you still cannot see the course, it may be because the activity is reserved for students enrolled in specific degree programmes and/or years of study. Please check the course requirements on the course information page before attempting to register.