same old bug never got fixed ?

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2020.04.02 11:26:28.986 '613xxxxx': order buy 0.02 USDJPY opening at 107.497 sl: 0.000 tp: 0.000 failed [Common error]

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2020.04.02 11:35:09.719 '613xxxxx': order sell 0.02 USDJPY opening at 107.479 sl: 107.746 tp: 107.096 failed [Common error]


How should one understand that kind of error ?
What to fix ? 
It happened only when I connect thru Metaquotes DEMO server.

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It works when I use other broker, also using demo account

2020.04.02 11:28:24.496 '89xxxxx': order was opened : #453548139 sell 0.02 USDJPY at 107.485 sl: 107.746 tp: 107.096

NOTE:
Order is placed using F9 (New Order Form/Dialog)

PS:
Yes, I did some forum search prior posting this.
Documentation on MQL5: Constants, Enumerations and Structures / Environment State / Account Properties
Documentation on MQL5: Constants, Enumerations and Structures / Environment State / Account Properties
  • www.mql5.com
, then each symbol positions will be closed in the same order, in which they are opened, starting with the oldest one. In case of an attempt to close positions in a different order, the trader will receive an appropriate error. There are several types of accounts that can be opened on a trade server. The type of account on which an...
 

Soewono Effendi:

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It happened only when I connect thru Metaquotes DEMO server.
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MetaQuotes Demo server is mostly used to upgrade Metatrader to the new build and to test beta versions of Metatrader.
It is recommended to use the demo accounts from the brokers in case of trading/testing/etc

 
Aha ... buggy swrver..
Noted.
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