Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - symfony/console is locked to version v6.3.4 and an update of this package was not requested. - symfony/console v6.3.4 requires symfony/polyfill-mbstring ~1.0 -> could not be found in any version, there may be a typo in the package name. Problem 2 - symfony/string is locked to version v6.3.5 and an update of this package was not requested. - symfony/string v6.3.5 requires symfony/polyfill-ctype ~1.8 -> could not be found in any version, there may be a typo in the package name. Potential causes: - A typo in the package name - The package is not available in a stable-enough version according to your minimum-stability setting see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details. - It's a private package and you forgot to add a custom repository to find it Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.