{"record":{"id":"1a32c10084b0dec5","repo":"microsoft/autogen","slug":"failed-to-create-session","errorCode":null,"errorMessage":"Failed to create session","messagePattern":"Failed to create session","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"python/packages/autogen-studio/frontend/src/components/views/playground/api.ts","lineNumber":47,"sourceCode":"  }\n\n  async createSession(\n    sessionData: Partial<Session>,\n    userId: string\n  ): Promise<Session> {\n    const session = {\n      ...sessionData,\n      user_id: userId, // Ensure user_id is included\n    };\n\n    const response = await fetch(`${this.getBaseUrl()}/sessions/`, {\n      method: \"POST\",\n      headers: this.getHeaders(),\n      body: JSON.stringify(session),\n    });\n    const data = await response.json();\n    if (!data.status)\n      throw new Error(data.message || \"Failed to create session\");\n    return data.data;\n  }\n\n  async updateSession(\n    sessionId: number,\n    sessionData: Partial<Session>,\n    userId: string\n  ): Promise<Session> {\n    const session = {\n      ...sessionData,\n      id: sessionId,\n      user_id: userId, // Ensure user_id is included\n    };\n\n    const response = await fetch(\n      `${this.getBaseUrl()}/sessions/${sessionId}?user_id=${userId}`,\n      {\n        method: \"PUT\",","sourceCodeStart":29,"sourceCodeEnd":65,"githubUrl":"https://github.com/microsoft/autogen/blob/027ecf0a379bcc1d09956d46d12d44a3ad9cee14/python/packages/autogen-studio/frontend/src/components/views/playground/api.ts#L29-L65","documentation":"Thrown by SessionAPI.createSession when POST /sessions/ returns a body with falsy status. The method force-injects user_id into the payload before sending; failures are usually validation of the session body (missing team, invalid windows/websocket config) or backend DB write errors, all reported through the status envelope.","triggerScenarios":"POST /sessions/ with {...sessionData, user_id} returning {status:false}: required fields missing (e.g. no team or invalid component), user_id not registered in backend, DB constraint violation, auth failure.","commonSituations":"Creating a session before a team is selected/saved, sessionData built from an unsaved gallery component, backend model/schema version drift rejecting the JSON payload.","solutions":["Read data.message — FastAPI validation errors are usually surfaced there","Ensure a valid team/component reference exists before creating the session (save the team first)","POST the same payload via curl to see the raw 422/validation detail","Confirm user_id exists on the backend (create it via the user endpoint or login flow first)"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"function isValidSessionPayload(s: Partial<Session>): boolean {\n  return !!(s && s.team); // adjust to backend's required fields\n}","typeGuard":null,"tryCatchPattern":"try {\n  return await sessionAPI.createSession(sessionData, userId);\n} catch (e) {\n  notify(`Session not created: ${e instanceof Error ? e.message : e}`);\n  return null;\n}","preventionTips":["Only enable 'start session' after a team is saved and selected","Dry-run payloads against the backend openapi schema in CI","Keep sessionData minimal — send only fields the backend model defines"],"tags":["sessions","http","validation","error-envelope"],"backgroundTag":null,"analyzedSha":"027ecf0a379bcc1d09956d46d12d44a3ad9cee14","analyzedAt":"2026-08-15T03:38:00.719Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}