I can't sent tokens from MetaMask Wallet to Binance

Firstly, I have sent some Reef coin from Binance to MetaMask Wallet - which is connected with BSC already - and it was succeeded.
But the next day I could not send it back, for sure I copied the right Binance address and everything seem to be normal but as a result, it shows me that the transaction was failed. (the GWEI fees I selected was 0, and limited gas was 21000)
I have tried several times, but it doesn’t work either.
Can somebody help me with this problem?

I have solved this problem.

Hey! I have a similar problem. can i find out how you solved it?

Probably didn’t have enough gas money. Other networks use various other tokens for gas.