Object reference not set to an instance of an object.

Any idea what would cause an "Object reference not set to an instance of an object." error when I attempt to get latest.

20:28:08.884|Error |n=7f465a1c156d4d57]]|22 |An exception occurred whilst performing an operation
System.NullReferenceException: Object reference not set to an instance of an object.
at #NtZc.#d1Xc.#efId(RelationalIndex #KtPb)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
at #NtZc.#d1Xc.#9eId(IDataCompareTableMapping #cdsc, TableDataConfigSelectedness #afId)
at #NtZc.#WtZc.#yxId(IDataCompareTableDifference #gdsc)
at System.Linq.Enumerable.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x)
at System.Linq.Enumerable.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer)
at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector)
at #KsZc.#07Cb.#77Cb(IDatabaseId #QOPb, IEnumerable`1 #kjib)
at #NtZc.#xHR.#77Cb(IDatabaseId #QOPb, IEnumerable`1 #VeId)
at RedGate.SQLSourceControl.Engine.Diff.ToRetrieveChangeSetBase.UpdateTableDataConfigStore(IEnumerable`1 selectedDatabaseObjectIdRemovals)
at #GWeb.#ZXM.#x3.#ZYM(ICancellableOperationStatus #yTb)
at RedGate.SQLSourceControl.Engine.Utils.Task.NamedOperation.Operation(ICancellableOperationStatus cancellableOperation)
at RedGate.SQLSourceControl.Engine.Cancellables.CancellableOperation.<Invoke>b__8()
at RedGate.SQLSourceControl.Engine.Cancellables.CancellableOperationBase.InvokeWithTracker(Action action)
at RedGate.SQLSourceControl.Engine.Cancellables.CancellableOperation.Invoke()
at RedGate.SQLSourceControl.Engine.SharedUtilsUtils.DoActionWithCancel(ICancellableOperationStatus status, ICancellable cancellable, Action action)
at RedGate.SQLSourceControl.Engine.SharedUtilsUtils.DoActionWithStatus(ICancellableOperationStatus status, ICancellable cancellable, Action action)
at RedGate.SQLSourceControl.Engine.Cancellables.MultiStepCancellableOperation`1.ExecuteAsOnOperation(ICancellableOperationStatus status)
at RedGate.SQLSourceControl.Engine.Cancellables.MultiStepCancellableOperationWithPostTask`1.ExecuteAsOnOperation(ICancellableOperationStatus status)
at #mlhb.#iH1c.#FYM(#bD1c #wS3c, Boolean #iOEd, #5l4d #yS3c, #5l4d #dPJd, #ULZc #AS3c, List`1 #jIc, ILinkedDatabaseDetailsGetter #IBKd)
at #mlhb.#RLZc.#maKd(#5l4d #WNJd, #5l4d #yS3c)
at #mlhb.#RLZc.#ikKd(Boolean #hD3c, #5l4d #WNJd, #5l4d #yS3c)
at #mlhb.#RLZc.#gkKd(ICancellableOperationStatus #KHc, IVcsCallbacks #VHc, SourceControlOperation #mN3c)
at #mlhb.#DJ4c.#dRi(#ULZc #RlYb, IDifferenceSelector #xrWb, ICancellableOperationStatus #KHc, IVcsCallbacks #LOPb, IEngineOptions #Uc9b, ToRetrieveChangeSet& #Pcsc, ILinkedDatabaseDetailsGetter #IBKd)
at #R9Jd.#VXM.#RjKd[#NrPb](IBoundDatabase #PPPb, #BJ4c #C75d, ICancellableOperationStatus #KHc, IVcsCallbacks #LOPb, IDifferenceSelector #xrWb, Action #RqAc)
at #R9Jd.#VXM.#kYM(IBoundDatabase #PPPb, ICancellableOperationStatus #KHc, ISourceControlUserCallBacks #LOPb, IDifferenceSelector #xrWb)
at #GWeb.#4Ec.#8Jc(ICancellableOperationStatus #KHc, ISourceControlUserCallBacks #iIc, IDifferenceSelector #xrWb)
at #GWeb.#4Ec.#izb.#SB7b(ICancellableOperationStatus #KHc)
at RedGate.SQLSourceControl.Engine.Cancellables.MutexedCancellableOperation`1.<>c__DisplayClass1.<Invoke>b__0()
at RedGate.SQLSourceControl.Engine.Cancellables.CancellableOperationBase.InvokeWithTracker(Action action)
at RedGate.SQLSourceControl.Engine.Cancellables.MutexedCancellableOperation`1.Invoke()
at RedGate.SQLSourceControl.Engine.Cancellables.CancellableOperationPostProcesser`2.Invoke()
at RedGate.SQLSourceControl.CommonUI.Controls.CancellableControl`2.<>c__DisplayClassa.<InvokeOperation>b__8()
at RedGate.SQLSourceControl.Engine.Logging.ErrorReporting.ErrorReporterBase.Do(Action toDo, Predicate`1 isErrorSourceUnknownPredicate, Boolean rethrow)
at RedGate.SQLSourceControl.CommonUI.ErrorHandling.SaErrorReporter.DoWithObviousExceptionsRethrowAll(Action action)
at RedGate.SQLSourceControl.CommonUI.Controls.CancellableControl`2.InvokeOperation(ICancellableOperation`1 operation, Object token)