大家好，我在用 hardhat 18.20.4 版本，yarn 1.22.22 验证合约时，报了个错误 NetworkRequestError: A network request failed. This is an error from the block explorer, not Hardhat. Error: Response does not match the HTTP/1.1 protocol (Expected HTTP/)

[GXWXJY]

NetworkRequestError: A network request failed. This is an error from the block explorer, not Hardhat. Error: Response does not match the HTTP/1.1 protocol (Expected HTTP/)

[TatyOko28]

Verify your Etherscan API key is set up correctly in .env and hardhat.config.js.
Ensure your Sepolia network configuration is accurate.
Update Hardhat and plugins to the latest versions.
Retry verification using the correct contract address and network.