Exception in console + Ownership doesn't work

1) I get this error when Harbor event starts:

11/04 07:50:03 | Failed to run a 0.20 timer in 'HarborEvent v2.4.1' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.HarborEvent+ControllerHarborEvent.EnablePveMode (Oxide.Plugins.HarborEvent+PveModeConfig config, BasePlayer player) [0x002d8] in <de2c5c89a2874bb594ca616e76f07ec2>:0
at Oxide.Plugins.HarborEvent+<>c__DisplayClass89_0.<Start>b__1 () [0x0001b] in <de2c5c89a2874bb594ca616e76f07ec2>:0
at Oxide.Core.Libraries.Timer+TimerInstance.FireCallback () [0x00018] in <15f61ddda771464d8246ebdce8ff4811>:0

2) Ownership doesn't work - not becoming event owner after bots or tank is killed.
I'm using PVE version of the plugin. Here are the settings from MonumentOwner related to PVE:

"PVE Mode Setting (only for users PveMode plugin)": {
    "Use the PVE mode of the plugin? [true/false]": true,
    "The amount of damage that the player has to do to become the Event Owner": 300.0,
    "Damage Multipliers for calculate to become the Event Owner": {
      "Npc": 1.0,
      "Bradley": 2.0,
      "Helicopter": 1.0
    },
    "Can the non-owner of the event loot the crates? [true/false]": false,
    "Can the non-owner of the event hack locked crates? [true/false]": false,
    "Can the non-owner of the event loot NPC corpses? [true/false]": false,
    "Can the non-owner of the event deal damage to the NPC? [true/false]": false,
    "Can the non-owner of the event do damage to Bradley? [true/false]": false,
    "Can the non-owner of the event do damage to Patrol Helicopter? [true/false]": false,
    "Can an Npc attack a non-owner of the event? [true/false]": false,
    "Can Bradley attack a non-owner of the event? [true/false]": false,
    "Can Patrol Helicopter attack a non-owner of the event? [true/false]": false,
    "Allow the non-owner of the event to enter the event zone? [true/false]": true,
    "Allow a player who has an active cooldown of the Event Owner to enter the event zone? [true/false]": true,
    "The time that the Event Owner may not be inside the event zone [sec.]": 300,
    "The time until the end of Event Owner status when it is necessary to warn the player [sec.]": 60,
    "Prevent the actions of the RestoreUponDeath plugin in the event zone? [true/false]": true,
    "The time that the player can`t become the Event Owner, after the end of the event and the player was its owner [sec.]": 86400.0,
    "Darkening the dome (0 - disables the dome)": 12
  },

I also have MonumentOwner plugin - but I don't see any points shown to me when event starts. Existing Harbor ownership just disappears