goto definition not working [alt + down key]

[lksh2812]

[Enter steps to reproduce:]

1. alt + down key on model declaration
2. ...

Atom: 1.45.0 x64
Electron: 4.2.7
OS: Pop!_OS 20.04
Thrown From: atom-elixir package 0.2.3

Stack Trace

Uncaught TypeError: Cannot read property 'stdin' of null

At /home/lokesh/.atom/packages/atom-elixir/lib/server-process.coffee:164

TypeError: Cannot read property 'stdin' of null
    at ServerProcess.module.exports.ServerProcess.sendRequest (/packages/atom-elixir/lib/server-process.coffee:164:13)
    at ServerProcess.module.exports.ServerProcess.getDefinitionFile (/packages/atom-elixir/lib/server-process.coffee:88:6)
    at ElixirGotoDefinitionProvider.module.exports.ElixirGotoDefinitionProvider.gotoDefinition (/packages/atom-elixir/lib/elixir-goto-definition-provider.coffee:59:13)
    at /packages/atom-elixir/lib/elixir-goto-definition-provider.coffee:19:10)
    at CommandRegistry.handleCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:349290)
    at KeymapManager.dispatchCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:1254747)
    at KeymapManager.handleKeyboardEvent (/usr/share/atom/resources/app/static/<embedded>:11:1250881)
    at WindowEventHandler.handleDocumentKeyEvent (/usr/share/atom/resources/app/static/<embedded>:11:284496)

Commands

     -2:28.1.0 atom-elixir:goto-definition (input.hidden-input)

Non-Core Packages

atom-elixir 0.2.3 
git-blame 1.8.0 
language-elixir 0.24.0