so I tried using hardhat to do testing, but I got this error now, i was try what gpt sugest to me but stil having same error what should I do?

Stop using GPT first of all and read some documentation

That's because chatGpt has been trained with data up to 2021, they're upgrading the models with some new data but on solidity it will likely suggest outdated informations.
Web3 is a fast-paced development space, documentations are the way