It seems there is an issue with the BuildingSkins I'm getting this exception constantly 

Failed to run a 1.00 timer in 'BuildingSkins v2.0.7' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.BuildingSkins.OnPlayerConnected (BasePlayer player) [0x00073] in :0 at Oxide.Plugins.BuildingSkins+<>c__DisplayClass14_0.b__0 () [0x00000] in :0 at Oxide.Core.Libraries.Timer+TimerInstance.FireCallback () [0x00018] in :0

I Just wrapped the OnPlayerConnect and OnPlayerREspawn Hooks with a try catch if anyone is interested on fixing this issue

private void OnPlayerConnected(BasePlayer player)
{
    try {
        if (player == null || !player.IsConnected) return;
        if (player.IsReceivingSnapshot) {
            timer.Once(1f, () => OnPlayerConnected(player));
            return;
        }
        StartCoroutine(player, PreloadImages(player));
        if (!storedData.PlayerData.TryGetValue(player.userID, out var data)) {
            data = new Data {
                ChangeHammer = true,
                NeedsRepair = true,
                EnableAnimation = true,
                RandomColor = false,
                Color = 9
            };
            storedData.PlayerData[player.userID] = data;
        }
        player.LastBlockColourChangeId = data.RandomColor ? player.LastBlockColourChangeId : data.Color;
    } catch {
        Puts("Error in Building Skin on OnPlayerConnected");
    }
}




        private void OnPlayerRespawned(BasePlayer player)
        {

            try { StopCoroutine(player);

                if (player == null || !player.IsConnected) {
                    return;
                }
                var data = storedData.PlayerData.TryGetValue(player.userID, out var playerData) ? playerData : null;
                player.LastBlockColourChangeId = data?.RandomColor == false ? data.Color : player.LastBlockColourChangeId;
            } catch {
                Puts("Error in Building Skin on OnPlayerRespawned" );
            }

        }
​