symfony/var-dumper version is not resolvable
I'm trying to install the project and I have this error :
Your requirements could not be resolved to an installable set of packages.
- Installation request for symfony/symfony v3.4.15 -> satisfiable by symfony/symfony[v3.4.15].
- don't install symfony/var-dumper v4.1.4|don't install symfony/symfony v3.4.15
- Installation request for symfony/var-dumper v4.1.4 -> satisfiable by symfony/var-dumper[v4.1.4].
Doing composer require symfony/var-dumper
solve the problem.