Turnitin bot is requesting pages and types of technology that hasn't existed on one of your sites for years - probably over five years.
First question is - where are they even getting these links?
Second question is - why are they not obeying robots.txt for this site?
Turnitin bot is on this network:
O1.com NETBLK-O1-BLK4 (NET-65-98-128-0-1)
188.8.131.52 - 184.108.40.206
iParadigms, LLC NETBLK-65-98-224-0 (NET-65-98-224-0-1)
220.127.116.11 - 18.104.22.168