Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires payplug/sylius-payplug-plugin * -> satisfiable by payplug/sylius-payplug-plugin[dev-5dde6efd612fd29b19896754958a86cd41fbd7bd]. - payplug/sylius-payplug-plugin dev-5dde6efd612fd29b19896754958a86cd41fbd7bd requires sylius/sylius ^2.0 -> found sylius/sylius[v2.0.0-alpha.1, ..., 2.1.x-dev] but it conflicts with your root composer.json require (~1.12.0). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.