The job was canceled because "_8_1" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^11.0.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.1.1]. - phpunit/phpunit[11.0.0, ..., 11.1.1] require sebastian/diff ^6.0 -> found sebastian/diff[6.0.0, 6.0.1] but it conflicts with your root composer.json require (5.0.0 as 3.0.2).