[install-help]: keep getting error api key with openai

[lumintulogic-admin]

Describe the issue
I installed context_chat_backend using app_api with custom environment variables set in deployment options. I filled in CC_EM_BASE_URL, CC_EM_APIKEY, and CC_EM_MODEL_NAME in the respective text input fields. I tried to connect to https://api.openai.com/v1/models with the provided api key using Postman, and it's successful. However, i keep getting an EmbeddingException error message saying that incorrect api key is provided.

Context Chat Backend logs

{
    "timestamp": "2026-01-21T11:36:29.543525+00:00",
    "level": "ERROR",
    "logger": "ccb.vectordb",
    "message": "Error adding documents to vectordb",
    "filename": "pgvector.py",
    "function": "add_indocuments",
    "line": 179,
    "thread_name": "AnyIO worker thread",
    "pid": 431,
    "version": "5.2.0",
    "exc_info": "Traceback (most recent call last):\n  File \"/app/context_chat_backend/vectordb/pgvector.py\", line 149, in add_indocuments\n    chunk_ids.extend(self.client.add_documents(indoc.documents[i:i+batch_size]))\n                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/usr/local/lib/python3.11/dist-packages/langchain_core/vectorstores/base.py\", line 279, in add_documents\n    return self.add_texts(texts, metadatas, **kwargs)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/usr/local/lib/python3.11/dist-packages/langchain_postgres/vectorstores.py\", line 885, in add_texts\n    embeddings = self.embedding_function.embed_documents(texts_)\n                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/context_chat_backend/network_em.py\", line 134, in embed_documents\n    return self._get_embedding(texts)  # pyright: ignore[reportReturnType]\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/context_chat_backend/network_em.py\", line 92, in _get_embedding\n    raise e\n  File \"/app/context_chat_backend/network_em.py\", line 87, in _get_embedding\n    raise FatalEmbeddingException(response.text)\ncontext_chat_backend.types.FatalEmbeddingException: {\n    \"error\": {\n        \"message\": \"Incorrect API key provided: ***REDAC**D***. You can find your API key at https://platform.openai.com/account/api-keys.\",\n        \"type\": \"invalid_request_error\",\n        \"param\": null,\n        \"code\": \"invalid_api_key\"\n    }\n}\n",
    "source_id": "files__default: 30482854"
}

Setup Details (please complete the following information):

• Nextcloud Version: 32.0.5
• AppAPI Version: 32.0.0
• Context Chat PHP Version 5.2.0
• Context Chat Backend Version 5.2.0
• Nextcloud deployment method: nginx bare-metal
• Context Chat Backend deployment method: app_api daemon harp_proxy_docker