Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/fiasupport/support.fiasupport.xyz/vendor/webklex/php-imap/tests/StructureTest.php:21 Stack trace: #0 {main} thrown in /home/fiasupport/support.fiasupport.xyz/vendor/webklex/php-imap/tests/StructureTest.php on line 21