Good day!
I am really not sure where this topic should be split as it’s a question by itself. Since this is the first time the issue occurred to me, I am posting it here.
I use MT5 as my trading client. I have recently attempted to perform a BUY market execution to the pair EURCNH. However instead of propagating the execution, the request returned the following output. I must point out that I have never performed any market executions on EURCNH pair before (probably I opened some pending orders, but I closed them all soon after launching them) .

Has anybody else experienced this before? What does it mean?
What I’m interested in knowing whether this kind of message is coming from MT5 client, broker or the market itself.
Thank you in advance for your time 