Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/http-kernel ^8.0 -> satisfiable by symfony/http-kernel[v8.0.0, ..., v8.0.6]. - symfony/http-kernel[v8.0.0, ..., v8.0.6] require symfony/error-handler ^7.4|^8.0 -> found symfony/error-handler[v7.4.0, v7.4.4, v8.0.0, v8.0.4] but these were not loaded, likely because it conflicts with another require. Problem 2 - Root composer.json requires symfony/security-core ^8.0 -> satisfiable by symfony/security-core[v8.0.0, v8.0.3, v8.0.4]. - symfony/security-core[v8.0.0, ..., v8.0.4] require symfony/password-hasher ^7.4|^8.0 -> found symfony/password-hasher[v7.4.0, v7.4.4, v7.4.6, v8.0.0, v8.0.4, v8.0.6] but these were not loaded, likely because it conflicts with another require. Problem 3 - Root composer.json requires symfony/browser-kit ^8.0 -> satisfiable by symfony/browser-kit[v8.0.0, v8.0.3, v8.0.4]. - symfony/browser-kit[v8.0.0, ..., v8.0.4] require symfony/dom-crawler ^7.4|^8.0 -> found symfony/dom-crawler[v7.4.0, v7.4.1, v7.4.4, v7.4.6, v8.0.0, v8.0.1, v8.0.4, v8.0.6] but these were not loaded, likely because it conflicts with another require. Problem 4 - Root composer.json requires nucleos/user-bundle ^3.7 || ^4.0 -> satisfiable by nucleos/user-bundle[3.7.0, 4.0.0]. - nucleos/user-bundle[3.7.0, 4.0.0] require symfony/config ^6.4 || ^7.0 -> found symfony/config[v6.4.0, ..., v6.4.34, v7.0.0, ..., v7.4.6] but it conflicts with your root composer.json require (^8.0).