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My friend developed an Expert Advisor (EA) that sends notifications to Telegram. However, after installing it on a new VPS, the EA was no longer able to send notifications, while it continued to work normally on the previous VPS.
After investigating the issue, I noticed that the two VPS instances were running different MT5 builds.
Issue identified:
MT5 Build 6308: The EA is unable to send notifications to Telegram (Error 1009)
MT5 Build 6230: The EA works normally and successfully sends notifications to Telegram.
I tested downgrading MT5 from Build 6308 to Build 6230, and the EA immediately resumed working as expected.
This suggests that the issue may be related to changes introduced in MT5 Build 6308.
I hope this information will help your technical support and development teams investigate and resolve the issue in a future update.
Thank you for your attention.
Best regards,