NomicLabsHardhatPluginError: Unsupported network ("sepolia", chainId: 11155111)

[mshahzadmalik1995]

I am trying to verify the contract on Sepolia network and getting below exception.
Kindly help me to resolve this issue.
NomicLabsHardhatPluginError: Unsupported network ("sepolia", chainId: 11155111).
at getEtherscanEndpoints (C:\Shahzad\NFT My practice\hardhat-simple-storage-my\node_modules@nomiclabs\hardhat-etherscan\src\network\prober.ts:34:11)
at processTicksAndRejections (node:internal/process/task_queues:95:5)

I also try to this solution which is provided at this url: https://hardhat.org/hardhat-runner/plugins/nomiclabs-hardhat-etherscan

[alymurtazamemon]

@mshahzadmalik1995 This happens when you use the old hardhat-waffle dependency. You should migrate the project to hardhat-toolbox plugin, check this migration guide here

[mshahzadmalik1995]

Thankyou @alymurtazamemon for resolving this issue

[mshahzadmalik1995]

After doing the above step. We need update the ethers version from 6.0.2 to 5.7.2. Otherwise it will give a JSONRpcProvider issue.