Binance: “Invalid symbol.”
Updated
Issue happening in case you selected TradingView Symbol which is not supported by Binance.

Please find list of supported symbols for your Market by the links below:
SPOT Symbols
MARGIN Symbols
FUTURES Symbols
Please note that for FUTURES Market TradeAdapter automatically omitting “.P” in Symbols. E.g. in case you selected BTCUSDT.P in TradingView, the trade will be send to BTCUSDT in Binance.