Well, to be fair, the link shows a list of 64 out of 70 invitees, so there are 6 more players who were invited but the person didn't catch their names yet to complete his list, so you can't definitely say that Bender was not invited.
Bender is a legit top 5 candidate in this draft. If he indeed did not get invited, I'm sure its due to a conflict of some sort, possibly his season still ongoing abroad.