Fatal error: Uncaught Error: Interface "Exchanger\Contract\CurrencyPair" not found in /home/ntpcbgtpp/public_html/mat1/vendor/florianv/exchanger/src/CurrencyPair.php:23 Stack trace: #0 {main} thrown in /home/ntpcbgtpp/public_html/mat1/vendor/florianv/exchanger/src/CurrencyPair.php on line 23