Why are you not able to level up in Lies of P?

For whatever reason, you can't level up in Lies of P. This Soulslike is tough so is this a glitch or do you need to go somewhere else?

Lies Of P: How To Level Up Quickly

I have officially “beat” lies of p. 6 play throughs. Max level (561). Platinum trophy. Max P Organ. Safe to say I love this game. : r/LiesOfP

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