ModifyStopLossPrice consistantly throwing exception.

I've run into an issue in my indicator which I believe may be a platform issue (big call, I know... but I think I've eliminated all the other possibilities...)

Simply, in my indicator, i use a position object and call ModifyStopLossPrice and parse in the new stop loss value. I have simplified my code during testing this issue to even hard code the stop loss value directly it to a current open position.  I have tried refactoring and accessing this method in different ways, even down to placing it directly in the calculate method. Everything I have tried has yielded the same results.  This is the code I'm running. As I have said, this has been accessed in various means, even from within calculate method:

foreach(Position position in Positions)
{
    if (position.SymbolName == "CADCHF" && position.StopLoss != 0.65770)
    {
        try
        {
            position.ModifyStopLossPrice(0.65770);
        }
        catch (Exception ex)
        {
            Print(ex.ToString());
        }
    }
}

The resulting error message is as follows:

24/04/2023 06:58:40.086 | System.InvalidOperationException: Operation is not valid due to the current state of the object.
   at cTrader.Automate.Host.Runtime.Controllers.Trade.SmallTradeCommandChannel.SendTradeMessage(AutomateTradeMessage message)
   at cTrader.Automate.Host.Runtime.Controllers.Trade.SmallTradeApiController.OnBeginModifyPositionProtection(ISmallSymbol symbol, AutomateModifyPositionProtectionCommandDto& cmdDto)
   at cTrader.Automate.Host.Runtime.Controllers.Trade.SmallTradeApiControllerBase.BeginModifyPositionProtection(AutomateModifyPositionProtectionCommandDto& cmdDto)
   at cTrader.Automate.Host.Runtime.Controllers.Trade.SmallTradeApiControllerBase.cTrader.Automate.Host.Runtime.Controllers.Trade.ISmallTradeApiController.BeginModifyPositionProtection(AutomateModifyPositionProtectionCommandDto& cmdDto)
   at cTrader.Automate.Host.Runtime.Api.Trade.SmallTradeMethods.ModifyPositionProtection(AutomateModifyPositionProtectionCommandDto& commandDto)
   at cTrader.Automate.Host.Runtime.Api.Trade.SmallTradeMethods.cTrader.Automate.Host.Runtime.Api.Trade.ISmallTradeMethods.ModifyPositionProtection(AutomateModifyPositionProtectionCommandDto& commandDto)
   at cTrader.Automate.Adapters.TradeApi.TradeMethodsAdapter.ModifyPosition(Position position, Nullable`1 stopLoss, Nullable`1 takeProfit, Boolean hasTrailingStop, Nullable`1 stopLossTriggerMethod)
   at cTrader.Automate.Adapters.OrderApi.PositionAdapter.ModifyStopLossPrice(Nullable`1 stopLoss)
   at cAlgo.ZipLineControlCenter.Calculate(Int32 index) in D:\Documents\cAlgo\Sources\Indicators\ZipLine Control Center\ZipLine Control Center\ZipLine Control Center.cs:line 155

Within the automate log, the trade message is sent, which shows the take profit of the position. (I removed the position ID)

24/04/2023 06:58:40.086 | Modifying position PIDXXXXXXXX (SL: 0.6577, TP: 0.66382)

This indicates to me that the position object is not null and the stop loss value has been parsed into the method correctly. After this message is shown, the exception above is thrown.

Is this a case of this method being accessible through the Indicator class when it actually shouldn't be? Is there potentially a platform issue? Or am I just an idiot and have missed something obvious?

Thanks in advance for reading this far and any assistance/info/guidance you provide.