Sequence contains no matching element

Platform: Windows 10

Do you have any mods? All are disabled

Please explain the issue is in as much detail as possible: Getting an error message. Error: Sequence contains no matching element at System.Llnq.Enumerable.Single[TSource](System.Collections.Generic.lEnumberable1[T] source, System.Func2[T,TResult] predicate) and then more numbers and characters.

Running v2.1.5c. All mods disabled in Unity.

Disabling mods is generally not enough, especially if they are the culprit.

The game was updated yesterday, check to update your mods or delete your mod folder and verify the integrity of the game files.

Deleted Mods file folder, didn’t help.
Uninstalled game on my laptop, reinstalled. Still getting the same error message.
Now I have a version on my desktop with the mods, disabled, and another version on my laptop, clean. Neither will run. Any other ideas?

Where do you get that error message? At launch or when loading the save file?

If you get that error when trying to load the save file, you need to update ALL your mods and UMM.