Was given credit for years of war conquest with only 3 qualifying set bonuses completed. No pet reward given. Went ahead and did 3 more lvl 55 rifts with other listed sets that i hadnt done. No update to quest as it still shows completed. Still no pet.
Do you already have the Book of Cain Pet from Season 17 ?
According to the Season 34: Light’s Calling Blog under Season Cosmetic Rewards:
…two new cosmetic ones for those who complete the entirety of the Season journey.
Make sure you don’t have any other Season Journey Objectives, in previous Chapters, that you “hadn’t done”.