Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires oat-sa/lib-test-cat dev-feat/FUN-1740/update-guzzle-client as 99.99.99 -> satisfiable by oat-sa/lib-test-cat[dev-feat/FUN-1740/update-guzzle-client]. - Conclusion: don't install guzzlehttp/guzzle 7.8.1 (conflict analysis result) - oat-sa/extension-tao-testqti dev-c9db6de954faf320032d2f98d2e249715ab44404 requires oat-sa/tao-core >=54.14.7 -> satisfiable by oat-sa/tao-core[v54.14.7, ..., v54.17.0, 9999999-dev]. - Root composer.json requires oat-sa/extension-tao-testqti dev-c9db6de954faf320032d2f98d2e249715ab44404 as v99.99.99 -> satisfiable by oat-sa/extension-tao-testqti[dev-c9db6de954faf320032d2f98d2e249715ab44404]. - oat-sa/lib-test-cat dev-feat/FUN-1740/update-guzzle-client requires guzzlehttp/guzzle ~7.0 -> satisfiable by guzzlehttp/guzzle[7.0.0-beta.1, ..., 7.9.x-dev]. - You can only install one version of a package, so only one of these can be installed: guzzlehttp/guzzle[6.0.0, ..., 6.5.x-dev, 7.0.0-beta.1, ..., 7.9.x-dev]. - oat-sa/tao-core[dev-master, v54.14.7, ..., v54.17.0] require guzzlehttp/guzzle ^6.5.7 -> satisfiable by guzzlehttp/guzzle[6.5.7, 6.5.8, 6.5.x-dev]. - Conclusion: don't install guzzlehttp/guzzle 6.5.8 (conflict analysis result)

Process completed with exit code 2.