I cannot submit images to Docker Models

Docker Desktop Model Runner
1

I am running the following model: ai/gemma3n (Quantization: IQ2_XXS/Q4_K_M)

I have n8n installed as a Docker container and can successfully connect to the model, prompt, and receive a response.

However, when I submit an image (converted to JSON RAW BASE64 as required by the compatible OpenAI API), I receive the following error (at the end of this message), which suggests that perhaps MMPROJ (the Ollama Multimodal Projector) is not enabled in Docker. Am I correct in saying that I cannot use the Docker OpenAI-compatible API to use multimodal vision?

If I am incorrect, and I can submit images, audio, and video (multimodal options listed in the Docker Model), how do I proceed?

{
  "errorMessage": "The service was not able to process your request",
  "errorDescription": "image input is not supported - hint: if this is unexpected, you may need to provide the mmproj",
  "errorDetails": {
    "rawErrorMessage": [
      "500 - \"{\\\"error\\\":{\\\"code\\\":500,\\\"message\\\":\\\"image input is not supported - hint: if this is unexpected, you may need to provide the mmproj\\\",\\\"type\\\":\\\"server_error\\\"}}\""
    ],
    "httpCode": "500"
  },
  "n8nDetails": {
    "nodeName": "HTTP Request",
    "nodeType": "n8n-nodes-base.httpRequest",
    "nodeVersion": 4.2,
    "itemIndex": 0,
    "time": "7/16/2025, 12:56:11 PM",
    "n8nVersion": "1.102.3 (Self Hosted)",
    "binaryDataMode": "default",
    "stackTrace": [
      "NodeApiError: The service was not able to process your request",
      "    at ExecuteContext.requestWithAuthentication (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_openai@5.8.1_ws@8.17.1_zod@3.25.67_/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:1476:10)",
      "    at processTicksAndRejections (node:internal/process/task_queues:105:5)",
      "    at ExecuteContext.requestWithAuthentication (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_openai@5.8.1_ws@8.17.1_zod@3.25.67_/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:1762:11)"
    ]
  }
}
2

I see this behaviour too. I’ve configured Docker Model Runner on Docker Engine on Ubuntu and added the OpenAI API endpoint to Open WebUI and get the same response.

500: image input is not supported - hint: if this is unexpected, you may need to provide the mmproj

image
image810×176 10.5 KB

Unfortunately I don’t have any answers and landed here while searching for the error. Text works just fine though.

3

Okay, thank you for trying and confirming anyway.