Using custom LLM : can't reach litellm api server

[kiruon019-rgb]

Affected Component
AI Agents (Researcher/Developer/...)

Describe the bug
Configuring the custom LLMs (litellm) section to include Qwen/Qwen3.6-27B doesn't work. When I want to create a flow, pentagi can't reach the api server.

Steps to Reproduce
Go to the .env file and in the custom LLMs section fill out the following details -
#Custom LLM provider
LLM_SERVER_URL=https://litellm.xxx.xxx.xxx.net
LLM_SERVER_KEY=sk-secret
LLM_SERVER_MODEL=Qwen/Qwen3.6-27B
LLM_SERVER_PROVIDER=
LLM_SERVER_CONFIG_PATH=
LLM_SERVER_LEGACY_REASONING=
LLM_SERVER_PRESERVE_REASONING=

Run PentAGI with the following changes.

System Configuration
Deployment type: Custom Deployment.
LLM Provider: LiteLLM

Logs and Artifacts
[GIN] 2026/06/25 - 11:12:39 | 200 | 130.114746ms | 10.2.0.1 | GET "/api/v1/info?refresh_cookie=true" time="2026-06-25T11:12:44Z" level=info msg="flow created in DB" flow_id=104 provider_name=custom provider_type=custom user_id=1 time="2026-06-25T11:12:44Z" level=error msg="failed to get flow provider" error="failed to get primary docker image: network error: failed to reach API server" time="2026-06-25T11:12:44Z" level=error msg="graphql request handled with errors" component=pentagi-gql duration=312.207875ms gql.errors="input: createAssistant failed to create flow worker: failed to get flow provider: failed to get primary docker image: network error: failed to reach API server\n" operation_name=createAssistant operation_type=mutation

Screenshots or Recordings

Verification

I have checked that this issue hasn't been already reported

I have provided all relevant configuration files (with sensitive data removed)

I have included relevant logs and error messages

I am running the latest version of PentAGI