File import callback not supported with hardhat

I'm facing compiling errors due to some problems with the packages installed

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

I'm using Hardhat and I'm trying to import the packages you see here, I already checked if they are present on the folders, and they are, I tried also to reinstall them. Don't know what to do...

Well, you obviously need to share what the problem is...

Right! I'm sorry I forgot to post the error... :man_facepalming:

TypeError: Member "toString" not found or not visible after argument-dependent lookup in uint256.
  --> contracts/WildDuckToken.sol:47:52:
47 |                 ? string(abi.encodePacked(baseURI, tokenId.toString(), ".json"))
   |                                                    ^^^^^^^^^^^^^^^^

Error HH600: Compilation failed

This is the error I got, it is due to the fact the package

import "@openzeppelin/contracts/utils/Strings.sol"

It's not imported correctly, at least is what I assumed. So, my question is how to fix this problem.
I'm using Hardhat.

That's got nothing to do with HardHat, as clearly evident by the compilation error, which points to a specific problem in your contract.

You probably need to add this at the top of that contract:

using Strings for uint256;