It should change all the skills of the target.

He's right, this doesnt work, I've doesnt use all trees never or upgrades them to the max points too often, a lot of skills looks like they working but skillroll - no, I've even thinks there's a mod error from mad skills due blocking skill decay, but, I've disabled all mods expect VPE and framework (18 december updated, and reinstalled them by hand) and again this doesn't work, no error even how I saw through dev console,

I could confirm as well that this skill did nothing except for made the castor down from the psychic coma + lost of psyfocus. I reload the save and tried it on different pawn and the result always the same. Target exp and skill level did not changed at all.

Not sure if this helps, but I get this error on casting Skillroll:

```
JobDriver threw exception in toil null's initAction for pawn Whiz driver=JobDriver_GotoTargetAndCastAbilityOnce (toilIndex=2)
System.NullReferenceException: Object reference not set to an instance of an object
at Verse.PawnGenerator.FinalLevelOfSkill (Verse.Pawn pawn, RimWorld.SkillDef sk, Verse.PawnGenerationRequest request) [0x0002e] in <3126aca1aad041dcbdeda807cfe004bf>:0
at VanillaPsycastsExpanded.Harmonist.Ability_Skillroll.Cast (RimWorld.Planet.GlobalTargetInfo[] targets) [0x00042] in <39a531dd99f541a593626aaa5844eaec>:0
at VFECore.Abilities.Ability.Cast (Verse.LocalTargetInfo target) [0x0001b] in <b30c1a7334d34c4a8ffafeffe58a00fe>:0
at VFECore.Abilities.JobDriver_CastAbilityOnce+<>c__DisplayClass5_0.<MakeNewToils>b__3 () [0x00075] in <b30c1a7334d34c4a8ffafeffe58a00fe>:0
at Verse.AI.JobDriver.TryActuallyStartNextToil () [0x001b0] in <3126aca1aad041dcbdeda807cfe004bf>:0
```

Skillroll still doesnt work. Came here to check if anyone else having an issue. It do nothing except putting caster into coma

can confirm. 100% reproduced error with only this mod enabled. sometimes Skillroll does work, but idk what can be the issue. code uses base game function to reshuffle skills, but it fails. perhaps not all skills can be passed to this function after some game update