Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - ocramius/package-versions is locked to version 1.4.2 and an update of this package was not requested. - ocramius/package-versions 1.4.2 requires composer-plugin-api ^1.0.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint. Problem 2 - robloach/component-installer is locked to version 0.2.3 and an update of this package was not requested. - robloach/component-installer 0.2.3 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint. Problem 3 - ocramius/package-versions 1.4.2 requires composer-plugin-api ^1.0.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint. - doctrine/orm v2.7.3 requires ocramius/package-versions ^1.2 -> satisfiable by ocramius/package-versions[1.4.2]. - doctrine/orm is locked to version v2.7.3 and an update of this package was not requested. ocramius/package-versions only provides support for Composer 2 in 1.8+, which requires PHP 7.4. If you can not upgrade PHP you can require composer/package-versions-deprecated to resolve this with PHP 7.0+. You are using Composer 2, which some of your plugins seem to be incompatible with. Make sure you update your plugins or report a plugin-issue to ask them to support Composer 2.