We are receiving the consolelog message "[Playtime Tracker] The selected reward system is not loaded. Unable to issue rewards" We are using no reward system.

Should we leave the Tag "Reward plugin (ServerRewards, Economics)" empty like this?

  "Reward Options": {
    "Reward plugin (ServerRewards, Economics)": "",
    "Playtime rewards": {
      "Issue rewards for playtime": false,
      "Reward interval (seconds)": 3600,
      "Reward amount": 15
    },

or should we leave it empty like this?:

  "Reward Options": [],

Personally i dont worry about it as it does not annoy the players ,I get the same type of message with BetterChat and ProximityAlert that "could not use clans feature, clans not found" , I use this plugin for PlayerRankings and have no problem with it,