NullReferenceException:

Hi. Ludiq!

this is my situations.

purchasing, install and some setup done.

made 4 ~ 5 flow graph and 1 state machine.

build dev version and tested it on my android phone.(successfully)

- next day -

reopened my project with unit graph.

right mouse button clicked on a canvas graph...infinite loading in unit search dialog

and below is that log.

NullReferenceException: Object reference not set to an instance of an object
Bolt.UnitOptionTree+<>c.<CodebaseChildren>b__42_0 (System.Type t) (at C:/Users/Lazlo/Projects/Ludiq/Bolt.Flow/Editor/Options/UnitOptionTree.cs:375)
System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1D`1[System.Type].MoveNext ()
System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[System.Type,Ludiq.Namespace].MoveNext ()
System.Collections.Generic.List`1[Ludiq.Namespace].AddEnumerable (IEnumerable`1 enumerable) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:128)
System.Collections.Generic.List`1[Ludiq.Namespace]..ctor (IEnumerable`1 collection) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:65)
System.Linq.Enumerable.ToArray[Namespace] (IEnumerable`1 source)
System.Linq.QuickSort`1[Ludiq.Namespace]..ctor (IEnumerable`1 source, System.Linq.SortContext`1 context)
System.Linq.QuickSort`1+<Sort>c__Iterator21[Ludiq.Namespace].MoveNext ()
System.Linq.Enumerable+<CreateDistinctIterator>c__Iterator3`1[Ludiq.Namespace].MoveNext ()
Bolt.UnitOptionTree+<CodebaseChildren>d__42.MoveNext () (at C:/Users/Lazlo/Projects/Ludiq/Bolt.Flow/Editor/Options/UnitOptionTree.cs:375)
Bolt.UnitOptionTree+<CategoryChildren>d__54.MoveNext () (at C:/Users/Lazlo/Projects/Ludiq/Bolt.Flow/Editor/Options/UnitOptionTree.cs:533)
System.Linq.Enumerable.Any[Object] (IEnumerable`1 source)
Ludiq.FuzzyWindow.Populate (Ludiq.FuzzyOptionNode node, IEnumerable`1 childrenValues, Nullable`1 cancellation) (at C:/Users/Lazlo/Projects/Ludiq/Ludiq.Core/Editor/Interface/Fuzzy/FuzzyWindow.cs:36)
Ludiq.FuzzyWindow+<>c__DisplayClass21_0.<Initialize>b__0 () (at C:/Users/Lazlo/Projects/Ludiq/Ludiq.Core/Editor/Interface/Fuzzy/FuzzyWindow.cs:236)
Ludiq.FuzzyWindow.Work () (at C:/Users/Lazlo/Projects/Ludiq/Ludiq.Core/Editor/Interface/Fuzzy/FuzzyWindow.cs:994)
UnityEngine.Debug:LogException(Exception)
Ludiq.FuzzyWindow:Work() (at C:/Users/Lazlo/Projects/Ludiq/Ludiq.Core/Editor/Interface/Fuzzy/FuzzyWindow.cs:999)