It´s maybe something stupid but when trying to ProbackTest my strategy I get “Please check your ProBackTest start date and end date” no matter which combination of dates I happen to choose.
Normally that message appears when an insufficient amount of data is loaded in the chart. So check for the first date/time the chart shows.
Control it with the “units” in the title bar.
PS: Tick that box “ProBacktest in Tick by tick mode” or else the backtest results may be wrong.