My character has a 7 Cha (don't judge
).
Assuming that a 10 in a stat allows for up to 0th level spells, that same math may cause a 7 to allow for up to negative 3rd level spells, which could explain the error message I am getting.
It sounds like maybe some of the psionic characters are now pulling Cha as their spell level limit stat even if their class uses Wis or Int.