Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires sylius-labs/coding-standard ^3.1 -> satisfiable by sylius-labs/coding-standard[v3.1.0, ..., v3.2.2]. - Root composer.json requires sylius/sylius >=1.12 <2.0 -> satisfiable by sylius/sylius[v1.12.0, ..., v1.14.2]. - sylius/sylius[v1.12.0, ..., v1.14.2] require psr/log ^2.0 -> satisfiable by psr/log[2.0.0]. - Conclusion: don't install psr/log 2.0.0 (conflict analysis result)

Process completed with exit code 2.