Verify implementation contract

Hi @abcoathup sir , As you Suggest i try to verify my implementation contract in etherscan it shows as follow
Compiler debug log:
Error! Unable to generate Contract ByteCode and ABI
Found the following ContractName(s) in source code : Inbox
But we were unable to locate a matching bytecode (err_code_2)


And i tried this two also but still i have conflict to verify and publish my contract * Learn guides on Upgrading Smart Contracts: https://docs.openzeppelin.com/learn/upgrading-smart-contracts