PayU Payment Integration Troubleshooting

I'm facing a critical issue with my PayU payment integration. The payment gateway is not loading on my website's checkout page. This problem is impacting user experience and could potentially lead to lost sales.

Ideal Skills:
- Proficient in troubleshooting payment gateway issues
- Experienced with PayU integration
- Knowledgeable in client-side validation processes

If you're a freelancer who can help diagnose and solve this problem promptly, I would love to hear from you.