Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nimut/typo3-complete ^12.4, found nimut/typo3-complete[dev-main, v7.6.0, v7.6.1, 7.6.x-dev, v8.7.0, 8.7.x-dev, v9.0.0, ..., 9.5.x-dev, v10.0.0, ..., 10.4.x-dev, v11.0.0, ..., 11.5.x-dev, 12.0.x-dev (alias of dev-main)] but it does not match the constraint.