Modding Help NullReferenceException help?

Code:

using StardewModdingAPI;
using StardewValley;
using System;

namespace FriendlierNPCs
{
    public class FriendlierNPCs : Mod
    {
        private Event currentEvent;
        private string name = "Mine";
        public override void Entry(params object[] objects)
        {
            StardewModdingAPI.Events.GameEvents.UpdateTick += GameEvents_UpdateTick;
           
        }

        private void GameEvents_UpdateTick(object sender, EventArgs e)
        {
            if (!Game1.hasLoadedGame)
                return;
            if (Game1.killScreen && !Game1.eventUp)
            {

                if (Game1.currentLocation.Equals("Mine"))
                {
                    string text = string.Empty;
                    string text2 = string.Empty;
                    switch (Game1.random.Next(14))
                    {
                        case 0:
                            text = "Robin";
                            text2 = "Data\\ExtraDialogue:Mines_PlayerKilled_Robin";
                            goto IL_B8;
                        case 1:
                            text = "Clint";
                            text2 = "Data\\ExtraDialogue:Mines_PlayerKilled_Clint";
                            goto IL_B8;
                        case 2:
                            text = "Abigail";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Abigail")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Abigail_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Abigail_NotSpouse");
                            goto IL_B8;
                        case 3:
                            text = "Alex";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Alex")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Alex_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Alex_NotSpouse");
                            goto IL_B8;
                        case 4:
                            text = "Elliot";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Elliot")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Elliott_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Elliott_NotSpouse");
                            goto IL_B8;
                        case 5:
                            text = "Emily";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Emily")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Emily_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Emily_NotSpouse");
                            goto IL_B8;
                        case 6:
                            text = "Haley";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Haley")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Haley_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Haley_NotSpouse");
                            goto IL_B8;
                        case 7:
                            text = "Harvey";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Harvey")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Harvey_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Harvey_NotSpouse");
                            goto IL_B8;
                        case 8:
                            text = "Leah";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Leah")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Leah_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Leah_NotSpouse");
                            goto IL_B8;
                        case 9:
                            text = "Maru";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Maru")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Maru_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Maru_NotSpouse");
                            goto IL_B8;
                        case 10:
                            text = "Penny";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Penny")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Penny_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Penny_NotSpouse");
                            goto IL_B8;
                        case 11:
                            text = "Sam";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Sam")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Sam_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Sam_NotSpouse");
                            goto IL_B8;
                        case 12:
                            text = "Sebastian";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Sebastian")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Sebastian_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Sebastian_NotSpouse");
                            goto IL_B8;
                        case 13:
                            text = "Shane";
                            text2 = ((Game1.player.spouse != null && Game1.player.spouse.Equals("Shane")) ? "Data\\ExtraDialogue:Mines_PlayerKilled_Shane_Spouse" : "Data\\ExtraDialogue:Mines_PlayerKilled_Shane_NotSpouse");
                            goto IL_B8;
                    }
                    text = "Linus";
                    text2 = "Data\\ExtraDialogue:Mines_PlayerKilled_Linus";
                IL_B8:
                    if (Game1.random.NextDouble() < 0.1 && Game1.player.spouse != null && !Game1.player.spouse.Contains("engaged") && Game1.player.spouse.Length > 1)
                    {
                        text = Game1.player.spouse;
                        text2 = (Game1.player.isMale ? "Data\\ExtraDialogue:Mines_PlayerKilled_Spouse_PlayerMale" : "Data\\ExtraDialogue:Mines_PlayerKilled_Spouse_PlayerFemale");
                    }
                    var killedString = Game1.content.LoadString(Game1.content.LoadString("Data\\Events\\Mine:playerKilled", new object[]
                    {
                    text,
                    text2,
                    Game1.player.name
                         }));
                    if (killedString != null)
                    {
                        this.currentEvent = new
                        Event(killedString, -1);
                    }
                }
                else if (this.name.Equals("Hospital"))
                {
                    this.currentEvent = new Event(Game1.content.LoadString("Data\\Events\\Hospital:playerKilled", new object[]
                    {
                        Game1.player.name
                    }), -1);
                }
            }
        }

    }
}

 

did you check if killedString has the string you wanted it to have? do a log for killedString

and don't you need to trigger the event itself? like currentEvent.start(); ?