My class skill didn't unlock!?

[SolidOkami]

Time: February 19, 2017 around 10:40PM GMT
Frequency: Only once
World name: Zodiark
Character name: Solid Wolf
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/level: Ninja/35
Party or solo: Solo
Race: Hyur male
In-game time: cannot remember
Area and coordinates: Southern Thanalan
Housing: None
Steps:
I was completing some main story quests, and then I levelled up to 35, however my Chi skill didn't unlock, so I continued leveling up to see if perhaps the issue would correct itself but it didn't I reached level 36 but the skill remained locked. I then simply proceeded to contacting the support desk, at which point I got redirected to here.

I play on the PS4.