Php-language-server: install error

[stardiviner]

composer require felixfbecker/language-server
I got following output error:

composer require felixfbecker/language-server
Using version ^5.4 for felixfbecker/language-server
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - felixfbecker/language-server v5.4.6 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - felixfbecker/language-server v5.4.5 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - felixfbecker/language-server v5.4.4 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - felixfbecker/language-server v5.4.3 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - felixfbecker/language-server v5.4.2 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - felixfbecker/language-server v5.4.1 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - felixfbecker/language-server v5.4.0 requires jetbrains/phpstorm-stubs dev-master -> satisfiable by jetbrains/phpstorm-stubs[dev-master] but these conflict with your requirements or minimum-stability.
    - Installation request for felixfbecker/language-server ^5.4 -> satisfiable by felixfbecker/language-server[v5.4.0, v5.4.1, v5.4.2, v5.4.3, v5.4.4, v5.4.5, v5.4.6].


Installation failed, reverting ./composer.json to its original content.

• My system: Arch Linux Linux dark 4.19.2-arch1-1-ARCH
• php -version
  PHP 7.2.12 (cli) (built: Nov 6 2018 15:07:37) ( NTS )
  Copyright (c) 1997-2018 The PHP Group
  Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies

[BaptN]

I ran in the same issue, trying to have the server installed somewhere out of any project.
You need to have a basic composer.json file with the following :

{ "minimum-stability": "dev", "require": { } }

[stardiviner]

Thanks, this fixed my problem.