When trying to open a few of my maps, possibly because of some mod item, I have no idea. I looked at the other reports and this was the only relevant part of the error I think you wanted to see. I can get the others at any time. This is just an example of one map I'm having the issue with, but it does happen on others, including the vanilla maps.
Love the tool!
Save:
D:\ArkServerManager\Servers\PlayerData\Olympus_17.10.2020_21.54.00.ark
Message:
Object reference not set to an instance of an object.
Trace:
at ArkSavegameToolkitNet.Domain.ArkGameData.<>c__DisplayClass13_1.<Update>b__28(GameObject x) in D:\Apps\ARKViewer-Master\ArkSavegameToolkitNet.Domain\ArkGameData.cs:line 201
at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at ArkSavegameToolkitNet.Domain.ArkGameData.Update(CancellationToken ct, ArkPlayerExternal[]