Please make sure that your liquidity is at Uniswap V2 (UNI-V2). Yield farming for YFBTC only support liquidity pool provided in UNI-V2.
Step 1 : Connect your wallet Step 2 : Choose V2 liquidity pool Step 3 : Add tokens YFBTC/ETH Uniswap Exchange as an LP
YFBTC smart contract: 0xff034d12353867fc4228f4ae3e689cd6dcaad120
Step 4 : Farm YFBTC with UNI-V2 LP Tokens