Fix Cashfree Gateway Issue

The Cashfree payment window on my WordPress site refuses to open at checkout. The gateway is set up through its official WordPress plugin, but I’m not sure whether the plugin—or any dependent WooCommerce files—are on their latest version.

I need someone who can:
• Pinpoint why the Cashfree modal/redirect is failing to load.
• Update or re-configure the plugin (and WooCommerce, if required) without breaking existing orders or theme customizations.
• Run a full test transaction to confirm the gateway opens, processes, and returns the correct success or failure response.

Please outline anything you’ll need from me (API keys, staging access, etc.) and roughly how long the fix should take. A quick, clean resolution is all I’m after; no other site work is required.