Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24\htdocs\cms_upgrade\vendor\paragonie\hidden-string\test\HiddenStringTest.php:9
Stack trace:
#0 {main}
thrown in C:\Apache24\htdocs\cms_upgrade\vendor\paragonie\hidden-string\test\HiddenStringTest.php on line 9