Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires swag/paypal * -> satisfiable by swag/paypal[9.6.5]. - swag/paypal 9.6.5 requires shopware/core ~6.6.0@dev -> found shopware/core[dev-trunk, v6.6.0.0-rc1, ..., 6.6.x-dev (alias of dev-trunk)] but these were not loaded, likely because it conflicts with another require.