This error typically appears when the trading terminal starts up and can be caused by a temporary bandwidth issue or an invalid trading account login.
Troubleshooting Steps:
Ensure you are logged in with a valid trading account. If using MT4, make sure you are logging in with an MT4 account, and likewise for MT5. Check the connection status to verify a successful login.
Right-click on the chart window and select "Refresh" to manually update the chart.
Drag an instrument from the "Market Watch" window onto the affected chart to see if it updates.
If the issue persists, check your internet connection, as an unstable connection may be the cause.