This probably has to do with the recent changes by MetaQuotes, you can read about it here:
Terminal: Restricted access to MQL5 trading and history functions if the account is subscribed to a signal.
When a signal subscription is detected on the account (regardless of whether copying is enabled in the current terminal), any MQL5 trading function calls are prohibited, including receiving open orders and positions, receiving history, and performing trading operations.
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Hi there,
I subscriped to a signal (MT5) additional to running Expert Advisors. The EAs open an close pending orders every 5 minutes when they run normally.
When I activate the signal on this account, then error 4752 occurs for every attempt to open such a pending order. As soon as a stop the signal (NOT unsubscibe), EAs work normally.
The developer of the EAs cannot help me. Does someone know what is the reason?