Could-not-load-System-Text-Json-after-upgrade-to-B89

CODE:

using WealthLab.Backtest;
using System;
using WealthLab.Core;
using WealthLab.Data;
using WealthLab.Indicators;
using System.Collections.Generic;
using System.Text.Json;

namespace WealthScript1 
{
    public class MyStrategy : UserStrategyBase
    {
        //create indicators and other objects here, this is executed prior to the main trading loop
        public override void Initialize(BarHistory bars)
        {
         string s = JsonSerializer.Serialize(bars.Scale);
         WriteToDebugLog(s);
        }

        //execute the strategy rules here, this is executed once for each bar in the backtest history
        public override void Execute(BarHistory bars, int idx)
        {
            if (!HasOpenPosition(bars, PositionType.Long))
            {
                //code your buy conditions here
            }
            else
            {
                //code your sell conditions here
            }
        }

        //declare private variables below

    }
}

CODE:

---Symbol by Symbol Debug Logs---
---SPY---
{"Frequency":0,"Interval":1,"FilterPrePost":false,"Description":"Daily","Abbreviation":"(D)","IsIntraday":false,"UsesIntervalForSort":false,"IsTickBased":false,"IsTimeBased":true}