Fatal error: Uncaught Error: Class "CoinGate\TestCase" not found in C:\xampp\htdocs\cms-propay\vendor\coingate\coingate-php\tests\CoinGate\BaseClientTest.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\cms-propay\vendor\coingate\coingate-php\tests\CoinGate\BaseClientTest.php on line 9