Fix CoinPayments Deposit Issue

I need help finalizing my CoinPayments gateway implementation. Withdrawals work, but deposits are giving an error. Specifically, transactions are not appearing.

Requirements:
- Review and troubleshoot the deposit error
- Ensure functionality of the CoinPayments gateway

Ideal Skills:
- Expertise in PHP
- Experience with CoinPayments API
- Strong debugging skills
- Familiarity with cryptocurrency transactions

Please check the API documentation for any recent changes.