Flutter Web Phonepe Integration, I Have PhonePe payment Gateway account and credentials and Tried to integrate to my Flutter Web Project and I Failed, After Hosting web app to Hostinger It shows error ie: (ClientException: XMLHttpRequest error.) ?

I am looking for someone who can help me integrate my PhonePe payment gateway account and credentials into my Flutter Web project. I have already hosted my web app on Hostinger, but I am receiving an error message that says "ClientException: XMLHttpRequest error."

Skills and Experience:
- Proficiency in Flutter Web development
- Experience with integrating payment gateways into Flutter projects
- Knowledge of PhonePe payment gateway integration
- Familiarity with Hostinger hosting platform