CRON don't work

I added a @daily cron task to a repo but it never started.
in the logs there is this:

drone-server_1  | {"branch":"master","cron":1,"error":"invalid character '\u003c' looking for beginning of value","level":"warning","msg":"cron: cannot find commit","repo":"studiomoto/competition_recoverer","time":"2019-10-22T00:27:52Z"}
drone-server_1  | {"branch":"master","cron":1,"error":"invalid character '\u003c' looking for beginning of value","level":"warning","msg":"cron: cannot find commit","repo":"studiomoto/competition_recoverer","time":"2019-10-23T00:27:54Z"}
drone-server_1  | {"branch":"master","cron":1,"error":"invalid character '\u003c' looking for beginning of value","level":"warning","msg":"cron: cannot find commit","repo":"studiomoto/competition_recoverer","time":"2019-10-24T00:28:04Z"}
drone-server_1  | {"branch":"master","cron":1,"error":"invalid character '\u003c' looking for beginning of value","level":"warning","msg":"cron: cannot find commit","repo":"studiomoto/competition_recoverer","time":"2019-10-25T00:09:44Z"}

Gitea version: 1.11.0+dev-87-g3c63c3ace
drone docker config:

version: '2'

services:
  drone-server:
    image: drone/drone:1
    ports:
      - 127.0.0.1:3003:80 //this port pass through NGINX
      - 9000
    volumes:
      - ./drone-server-data:/var/lib/drone/
      - /var/run/docker.sock:/var/run/docker.sock
      - ./data:/data
    restart: always
    env_file:
      - ./drone.env
  drone-agent:
    image: drone/agent:1
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: always
    env_file:
      - ./drone.env
DRONE_GITEA_SERVER=https://git.delta-wings.net/
DRONE_GITEA_CLIENT_ID=id
DRONE_GITEA_CLIENT_SECRET=secret

DRONE_ADMIN=Avior
DRONE_USER_CREATE=username:Avior,admin:true
DRONE_OPEN=true
DRONE_HOST=http://localhost

DRONE_RPC_SECRET=secret
DRONE_RPC_PROTO=https
DRONE_RPC_HOST=ci.delta-wings.net

DRONE_RUNNER_CAPACITY=2
DRONE_RUNNER_NAME=Runner

DRONE_GIT_ALWAYS_AUTH=false

DRONE_SERVER_PROTO=https
DRONE_SERVER_HOST=ci.delta-wings.net
DRONE_SECRET=secret

invalid character ‘\u003c’

This error indicates the API request to Gitea is returning an HTML page instead of a JSON response. We know this is a webpage because \u003c is < and is the first character in a webpage or a webpage redirect.

The most common reason for this error is a reverse proxy problem, server misconfiguration, or invalid endpoint. It looks like you had a similar error at Cannot get netrc file. It looks like network configuration issues to me, although I have not been provided with enough information to say for sure.

Is there any way to get the full webpage ?

Or,
Both my gitea and my drone instance are behind the same reverse proxy do I have to change the URL in drone to directly point to my gitea instance ?