Can't level up

[Slut of Corruption]

[0.8.22]I have reach max exp for level 8, but can't level up even though I have slept for multiple days

 

[Savin]

You have reached the level cap, congratulations.

 

[Slut of Corruption]

You have reached the level cap, congratulations.

Oh, what about the level 9 spells that I found?