NullReferenceException when iterating through IEnumrable<XrefInstance>

[GoldenretriverYT]

Hello,
I am getting a NullReferenceException when iterating through the IEnumerable object that is returned by XrefScanner.XrefScan - I have already looked at the generated IL code, and it seems like it happens when it moves onto the next entry in the IEnumerable.

Exception:

[11:39:18.482] [Arcadius_Mod] [ERROR] System.NullReferenceException: Object reference not set to an instance of an object
  at System.Buffer.memcpy1 (System.Byte* dest, System.Byte* src, System.Int32 size) [0x00002] in <e1319b7195c343e79b385cd3aa43f5dc>:0
  at System.Buffer.Memcpy (System.Byte* dest, System.Byte* src, System.Int32 size) [0x00058] in <e1319b7195c343e79b385cd3aa43f5dc>:0
  at System.Runtime.InteropServices.Marshal.ReadInt64 (System.IntPtr ptr) [0x00015] in <e1319b7195c343e79b385cd3aa43f5dc>:0
  at UnhollowerRuntimeLib.XrefScans.XrefScanner.XrefGlobalClassFilter (System.IntPtr movTarget) [0x0001d] in <8eb030b38f51415daeb459bae49fe0fc>:0
  at UnhollowerRuntimeLib.XrefScans.XrefScanner+<>c.<XrefScan>b__0_0 (UnhollowerRuntimeLib.XrefScans.XrefInstance it) [0x00009] in <8eb030b38f51415daeb459bae49fe0fc>:0
  at System.Linq.Enumerable+WhereEnumerableIterator`1[TSource].MoveNext () [0x00037] in <fbb5ed17eb6e46c680000f8910ebb50c>:0
  at MyMod.Class1.OnApplicationLateStart () [0x000a0] in <6cd357c9270946a7aa332220af7ac4ad>:0
  at MelonLoader.MelonHandler+<>c.<OnApplicationLateStart_Mods>b__31_0 (MelonLoader.MelonMod x) [0x00010] in <239dd078bb4e49c8a1ff8200d76f2e32>:0
  at MelonLoader.MelonHandler.InvokeMelonMethod[T] (System.Collections.Generic.List`1[T]& melons, MelonLoader.MelonHandler+InvokeMelonMethodDelegate`1[T] method, System.Boolean remove_failed) [0x00032] in <239dd078bb4e49c8a1ff8200d76f2e32>:0

Code:

public override void OnApplicationLateStart()
{
    logger = LoggerInstance;

    MethodBase mb = typeof(Menu_Blacksmith).GetMethod("RepairTool");

    if (mb == null)
    {
        LoggerInstance.Error("Unable to find RepairTool for some god damn reason");
    }
    else
    {
        var instances = XrefScanner.XrefScan(mb);

        if (instances == null)
        {
            LoggerInstance.Error("Instances is null");
        }
        else
        {
            foreach (XrefInstance instance in instances)
            {
                MethodBase calledMethod = instance.TryResolve();
                LoggerInstance.Msg(calledMethod?.Name);
            }
        }
    }

    UniverseLib.Universe.Init(OnUniverseLibInit);
}

[knah]

More information is needed here - which game is it, and is it 32-bit or 64-bit one?