unhandled exception with some brokers

Hi, i published just yesterday an indicator named ReaPivot, it works pretty well on all forex pairs but when loading it on indices like Euro50, UK100 and some others ctrader will prompt an error message and will ask to be restarted. The indicator will not start and draw anything on chart after this error.

The indicator is this one https://ctrader.com/algos/indicators/show/2021

The code does not present compile-time errors nor runtime exceptions as can be seen here:

I am kindly asking for assistance on this very issue since i cannot understand what the error is.

This is FXPro's cTrader platform

Thanks in advance

        -C