Defender Timelock contract verification failing

[Prash_Cha]

Hey. Thanks for helping me with this one. Actually I have another issue if you would be able to help me figure out what I am doing wrong.

Contract verification failing on etherscan

I have been trying to verify NFT contract that was deployed on June 28th 2022. The developer who deployed the contract is no longer in contact but I have the source code for it. I tried to verify it using Remix, Hardhat and manually through etherscan but it is failing. I think the openzeppelin contracts that were used during deployment were old version as the contract was deployed an year back almost. I do not know exactly what version of OpenZeppelin contracts were used but I know the compiler …