Exchange rates stuck at 1.000000 for USD, EUR, GBP, AUD

I’m using CURCY Premium with auto exchange rate enabled using default and many other exchange api keys

The issue is:

Exchange rates for most currencies work fine.

But USD, EUR, GBP, and AUD stay stuck at 1.000000

Even when I hit “Update Rate” manually, they don’t change

When I enter dummy rates manually, conversion works — so the plugin itself is fine

What I’ve tried:

Enabled auto-update

Added and verified my API key

Tried switching API providers

Cleared all caches (plugin + browser)

Enabled AJAX price loading

Help me figure out why these major currencies are not pulling the live rates while others are.