> For the complete documentation index, see [llms.txt](/es/llms.txt).

This section provides help on some potential issues you may run into and tips on how to resolve them.

## Summary

Common Hardhat errors when developing on Rootstock and how to fix them.

| Error | Fix |
|-------|-----|
| **HH8: Invalid account in config** (`Expected string, received undefined` for `rskMainnet` / `rskTestnet`) | Match `.env` values to `hardhat.config.js`. Run `source .env` in the project root |
| **Nothing to compile** | Delete the `artifacts` folder. Run `npx hardhat compile` again |
| **GET /MyToken.json 404** | Confirm contracts compiled and `artifacts` exists. Follow [interact with frontend](/developers/smart-contracts/hardhat/interact-with-frontend/) steps in order |
| **HH601: Script scripts/deploy.js doesn't exist** | Run `npx hardhat run --network hardhat scripts/deploy.js` from the project root directory |

## Errors

````mdx-code-block

````