Solution
NI Software for students is subscription based so it is possible that the date of your subscription has passed hence you will not able to activate the software. The Student Edition license can be used only for 6 months.
If you are a student of an University covered by an active Academic Site License, you should get in contact with your IT Help Desk or Service Desk and ask them for the
Student Install serial number (activation code) and use this to activate NI software.