Why does not see the variable in http?

Question

phpstorm

I make this request in phpStorm

GET http://{{host}}/v3/institution/menu/categories?id=310
Content-Type: application/json
Authorization: Bearer {{token}}

###

Why does it write to me

GET http://{{host}}/v3/institution/menu/categories?id=310

Invalid URI because of unsubstituted variable 'host' at D:\domains\myata_sf\httpClient\auth.http:8:12
Possible solutions:
1. Add new environment file
2. Add variable to existing environment
3. Run with environment

Although http-client.env.json is written

{
  "dev": {
    "host": "value"
  }
}

And this file is located in the same directory where I try to send an http request via phpStorm
What could be the problem and when I click to run the script, I only write run {{host}}
Although in other projects using variables, it writes like run dev, run text and so on

Answer 1

my file is called http-client.private.env.json