Hi Anggit,
To confirm the connection between the app and the EA, check if the green square at the bottom of the app is green and if you received a message in the Experts tab of MT4 that says “New client connection”. If not, try using another MT4 ID by selecting it in the inputs and in the app. Also, make sure you have selected the channels in the app for that ID.
Another reason can be if your broker uses prefixes or suffixes to the symbols’ names, like “EURUSD.r”. In this case, you need to enable using prefixes and suffixes and enter them in the inputs.
Let us know if any of this helped,
Telegram.Forex