Raidable Bases Quest Error Messages

After completing a RaidableBases Event the console is throwing the following Error Message

Failed to call hook 'OnRaidableBaseCompleted' on plugin 'Battlepass v1.37.7' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.Battlepass.GetMissionAmount (Oxide.Plugins.Battlepass+MissionConfig mission, Item item, BaseEntity entity, System.Int32 grade, System.Int32 itemAmount, System.String mode, ItemDefinition definition) [0x003be] in <34a6eb9e37934d85a6dd3a571f9cd7a4>:0
at Oxide.Plugins.Battlepass+GeneralMission.Check (BasePlayer player, Oxide.Plugins.Battlepass+PlayerData& data, Oxide.Plugins.Battlepass+MissionType type, Item item, BaseEntity entity, System.Int32 greade, System.Int32 itemAmount, System.String mode, ItemDefinition definition) [0x00076] in <34a6eb9e37934d85a6dd3a571f9cd7a4>:0
at Oxide.Plugins.Battlepass+<OnMissionsProgress>c__AnonStorey6.<>m__0 (Oxide.Plugins.Battlepass+GeneralMission check) [0x00000] in <34a6eb9e37934d85a6dd3a571f9cd7a4>:0
at System.Collections.Generic.List`1[T].ForEach (System.Action`1[T] action) [0x00024] in <fb001e01371b4adca20013e0ac763896>:0
at Oxide.Plugins.Battlepass.OnMissionsProgress (BasePlayer player, Oxide.Plugins.Battlepass+MissionType type, Item item, BaseEntity entity, System.Int32 grade, System.Int32 itemAmount, System.String mode, ItemDefinition definition) [0x0009e] in <34a6eb9e37934d85a6dd3a571f9cd7a4>:0
at Oxide.Plugins.Battlepass.OnRaidableBaseCompleted (UnityEngine.Vector3 raidPos, System.Int32 mode, System.Boolean allowPVP, System.String id, System.Single spawnTime, System.Single despawnTime, System.Single loadTime, System.UInt64 ownerId, BasePlayer owner, System.Collections.Generic.List`1[T] raiders, System.Collections.Generic.List`1[T] intruders, System.Collections.Generic.List`1[T] entities) [0x00045] in <34a6eb9e37934d85a6dd3a571f9cd7a4>:0
at Oxide.Plugins.Battlepass.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00e9e] in <34a6eb9e37934d85a6dd3a571f9cd7a4>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <09575a60985045248bcb43b20faeeb99>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <bae5f1223fce49c493b01571c99dce02>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <bae5f1223fce49c493b01571c99dce02>:0

Tryed all 3 types of config choices

"134": {
      "Mission description": "Raide eine einfache NPC-Basis",
      "Mission type": "RaidableBases",
      "Shortname/prefab": "",
      "Skin (0 - any item)": 0,
      "Upgrade Level (for 'Upgrade' missions)": 0,
      "Display Name (for 'Kill' missions)": "",
      "Amount": 1,
      "Amount of main reward": 1,
      "Give extra reward?": false,
      "Settings extra reward": {
        "Display Name (for display in the interface)": null,
        "ID": 0,
        "Chance": 0.0,
        "Item type": "Item",
        "Image (if empty - the icon is taken by shortname) ": null,
        "Display name (for the item) (if empty - standard)": null,
        "Shortname": null,
        "Skin": 0,
        "Amount (for item)": 0,
        "Command": null,
        "Plugin": null
      },
      "Give second currency?": false,
      "Amount of second currency": 0,
      "Mode (for 'RaidableBases' missions)": "Easy"
    },
	"135": {
      "Mission description": "Raide eine Medium NPC-Basis",
      "Mission type": "RaidableBases",
      "Shortname/prefab": "",
      "Skin (0 - any item)": 0,
      "Upgrade Level (for 'Upgrade' missions)": 0,
      "Display Name (for 'Kill' missions)": "",
      "Amount": 1,
      "Amount of main reward": 1,
      "Give extra reward?": false,
      "Settings extra reward": {
        "Display Name (for display in the interface)": null,
        "ID": 0,
        "Chance": 0.0,
        "Item type": "Item",
        "Image (if empty - the icon is taken by shortname) ": null,
        "Display name (for the item) (if empty - standard)": null,
        "Shortname": null,
        "Skin": 0,
        "Amount (for item)": 0,
        "Command": null,
        "Plugin": null
      },
      "Give second currency?": false,
      "Amount of second currency": 0,
      "Mode (for 'RaidableBases' missions)": null
    },
	"136": {
      "Mission description": "Raide eine schwere NPC-Basis",
      "Mission type": "RaidableBases",
      "Shortname/prefab": "",
      "Skin (0 - any item)": 0,
      "Upgrade Level (for 'Upgrade' missions)": 0,
      "Display Name (for 'Kill' missions)": "",
      "Amount": 1,
      "Amount of main reward": 1,
      "Give extra reward?": false,
      "Settings extra reward": {
        "Display Name (for display in the interface)": null,
        "ID": 0,
        "Chance": 0.0,
        "Item type": "Item",
        "Image (if empty - the icon is taken by shortname) ": null,
        "Display name (for the item) (if empty - standard)": null,
        "Shortname": null,
        "Skin": 0,
        "Amount (for item)": 0,
        "Command": null,
        "Plugin": null
      },
      "Give second currency?": false,
      "Amount of second currency": 0,
      "Mode (for 'RaidableBases' missions)": ""
    }

Ticket can be closed. Found the soultion myself.
Raidable Bases modes are Easy = 0, Medium = 1, Hard = 2, Expert = 3, Nightmare = 4

I have the same problem, where and how did you solve it exactly?

@Paul H.

There was an empty "Mode" in the config:

      "Mode (for 'RaidableBases' missions)": ""

Changed Status from Pending to Closed