Royal Squire's Robe Unable to be Equipped

Platform:
ISP:
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Character Name:
Race: Elvaan
World: Shiva
Main Job: Scholar
Support Job: Blackmage
Area and Coordinates: Souther Sandoria G-10
Party or Solo: Solo
NPC Name: Aravoge, T.K.
Monster Name:
Steps:
1. Selected spend conquest points
2.Selected rank 4 conquest rewards
3.Selected Royal Squire's Robes
4. NPC said I could equip
5. Scholar unable to equip item after purchasing

I replicated your issue as a SCH/BLM in the same location and NPC and was able to equip the item without any problem.

What level is your SCH?