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How to fix MinIO console: unable to login due to network error

Problem

When trying to login to the MinIO console, you get the error message:

unable to login due to network error

MinIO Unable to login due to network error

However, the MinIO server itself is working fine, and you can access it using the mc command line tool or S3-compatible clients.

Solution

In your docker-compose.yml running your MinIO server, you have set MINIO_SERVER_URL. This was required in older MinIO versions, but is no longer needed, and in fact, it breaks the console login.

Just remove the MINIO_SERVER_URL environment variable, and restart your MinIO container.

Broken config example

services:
   minio:
       image: quay.io/minio/minio:RELEASE.2025-07-23T15-54-02Z
       command: server --console-address ":9001" /data
       volumes:
          - ./data:/data
          - ./config:/root/.minio
       environment:
          - MINIO_ROOT_USER=minioadmin
          - MINIO_ROOT_PASSWORD=Aecae1ahl3yadath5uoz3ohSaihooh
          - MINIO_DOMAIN=minio.mydomain.com
          - MINIO_SERVER_URL=https://minio.mydomain.com
          - MINIO_BROWSER_REDIRECT_URL=https://console.minio.mydomain.com

Fixed config example

services:
   minio:
       image: quay.io/minio/minio:RELEASE.2025-07-23T15-54-02Z
       command: server --console-address ":9001" /data
       volumes:
          - ./data:/data
          - ./config:/root/.minio
       environment:
          - MINIO_ROOT_USER=minioadmin
          - MINIO_ROOT_PASSWORD=Aecae1ahl3yadath5uoz3ohSaihooh
          - MINIO_DOMAIN=minio.mydomain.com
          - MINIO_BROWSER_REDIRECT_URL=https://console.minio.mydomain.com

Now restart your MinIO container, and you should be able to login to the console again.