I do not think that it is a valid account number to a demo account. It can be a valid number of a real account. If you do not see "Demo Account" in the title bar, it's a real account for MT4, even when you cannot trade with real money on it.

You can anytime open a true demo account unter the MT4 "File" menu.

Hello All in my first message.

I have the same error in an account demo on Axitrader today.
A week ago I conect well and get Z1 strategy run in trade mode.
Zorro v 1.88.6

Sorry for my english if no correct.

Thanks to Zorro team.

I start 3 hours after the program and run well and I dont change anything.