I have been playing normally for about 10 years in my game and it has worked fine but all of a sudden it just exploded. They don't move and their ui for deactivating disappears unless I make them move as well as the game running at unusable slow speed. Plus it made my entire screen grey while unpaused but that seemed to be fixed with a reload at least.

It mentions the DSU which I have installed but I don't believe I've even researched it yet, plus it was fine up until the point so I can't really parse what could be the issue from this.

Here's the error it throws up a dozen or so times per second:

Exception ticking HaulingBot 27 (at (95, 0, 184)): System.NullReferenceException: Object reference not set to an instance of an object
at DigitalStorageUnit._harmony.Patch_Pawn_JobTracker_StartJob.Prefix (Verse.AI.Job newJob, Verse.Pawn& ___pawn, Verse.AI.JobCondition lastJobEndCondition, Verse.AI.ThinkNode jobGiver, System.Boolean resumeCurJobAfterwards, System.Boolean cancelBusyStances, Verse.ThinkTreeDef thinkTree, System.Nullable`1[T] tag, System.Boolean fromQueue, System.Boolean canReturnCurJobToPool) [0x00020] in <31511238263c41fb84f3acb77712271d>:0
at (wrapper dynamic-method) Verse.AI.Pawn_JobTracker.Verse.AI.Pawn_JobTracker.StartJob_Patch4(Verse.AI.Pawn_JobTracker,Verse.AI.Job,Verse.AI.JobCondition,Verse.AI.ThinkNode,bool,bool,Verse.ThinkTreeDef,System.Nullable`1<Verse.AI.JobTag>,bool,bool,System.Nullable`1<bool>,bool,bool)
at (wrapper dynamic-method) Verse.AI.Pawn_JobTracker.Verse.AI.Pawn_JobTracker.TryFindAndStartJob_Patch1(Verse.AI.Pawn_JobTracker)
at (wrapper dynamic-method) Verse.AI.Pawn_JobTracker.Verse.AI.Pawn_JobTracker.JobTrackerTick_Patch0(Verse.AI.Pawn_JobTracker)
at (wrapper dynamic-method) Verse.Pawn.Verse.Pawn.Tick_Patch1(Verse.Pawn)
at AIRobot.X2_AIRobot.Tick () [0x00151] in <87319c4614a345f59c3643b1ec80325f>:0
at Verse.TickList.Tick () [0x0015c] in <cd7169108ea74757aa50c5b33d275c15>:0

Hopefully it's an easy fix or at least someone can recognise it.