"Schema construction failed" when getting schema on model "en_v2"

[Lotes]

1. Create file docker-compose.yml:

   
   version: "2"

services: spacyapi: image: jgontrum/spacyapi:en_v2 ports:

• "127.0.0.1:8080:80" restart: always

  
  2. Execute `docker-compose up`
  3. Visit `GET /en/schema`

Result:

{
    "title": "Schema construction failed",
    "description": "'NoneType' object is not subscriptable"
}