Troubleshooting Reoon Power API Email Validation Errors

Hey everyone, I’m trying to use Reoon’s “Power” API to validate my emails but I keep getting this error. Anyone know’s what I’m doing wrong? I’m aware there is a template for the “Quick” version but it’s not working properly for me. Refer this documentation if you can help https://www.reoon.com/articles/api-documentation-of-reoon-email-verifier/.