as already mentioned in the comments, there now is this new bug with a null.referenze.exeption duo to the inspiration tracker. The dev changed something with that, destroying this mod, again.

So if anyone knows a fix to that, please submit it here.
ERROR LOG:

Root level exception in Update(): System.NullReferenceException: Object reference not set to an instance of an object
at PrisonLabor.Core.Trackers.InspirationTracker.Calculate (Verse.Map map) [0x001b6] in <f022c302ef03485194a2120d231f64d4>:0
at PrisonLabor.HarmonyPatches.Triggers+InsiprationTracker.Prefix (Verse.Map __instance) [0x00001] in <f022c302ef03485194a2120d231f64d4>:0
at (wrapper dynamic-method) Verse.Map.DMD<DMD<MapPostTick_Patch1>?-348895104::MapPostTick_Patch1>(Verse.Map)
at Verse.TickManager.DoSingleTick () [0x00176] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
at Verse.TickManager.TickManagerUpdate () [0x0006a] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
at Verse.Game.UpdatePlay () [0x00000] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
at Verse.Root_Play.Update () [0x00026] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
Verse.Log:Error(String, Boolean)
Verse.Root_Play:Update()

As mentioned, its not the mod, there were no new updates to that.
Prison Labor author, if you see that, maiby got a hint or a quick fix? Would be great.
For all for now, just remove prison labor from you save using the MOD SETTINGS: DO NOT JUST REMOVE IT, IT WILL BREAK THE GAME.
When a fix of either sides appear, just reinstall it. That function is working fine thanks to the smart devs of this mod.