Fatal error: Uncaught Error: Class 'Composer\IO\NullIO' not found in /home/demoinvfsanz/public_html/vendor/kylekatarnls/update-helper/tests/UpdateHelper/TestIO.php:7 Stack trace: #0 {main} thrown in /home/demoinvfsanz/public_html/vendor/kylekatarnls/update-helper/tests/UpdateHelper/TestIO.php on line 7