Did you find the root cause?
I am facing the same issue since today.

You are missing trading opportunities:
- Free trading apps
- Over 8,000 signals for copying
- Economic news for exploring financial markets
Registration
Log in
You agree to website policy and terms of use
If you do not have an account, please register
I got an issue since yesterday
this is what I got when I launch MT5 and try to backtest on Indices (and forex also)
I tried installing another instance in another directory and it works fine then, I can backtest no problem.
but I didn't change anything since yesterday when it was working ok
I don't want to migrate just for that, is there a solution ? (I already tried renaming temporally "tester" and "base" folders but it doesn't change anyhting
I tried changing dates and other settings here and there but no luck
thanks for any help
Jeff