Kong/insomnia · error · Error

Failed to render request

Error message

Failed to render request: ${request._id}

What it means

Fallback wrapper around getRenderedRequestAndContext: nunjucks/templating failed while rendering the request (bad tag, missing variable, etc.) and, since it is not already a RenderError, it is replaced by this generic sentinel that names only the request ID.

Solutions

1. Render the request template manually to find the failing tag (undefined variable, syntax error, plugin tag error)
2. Fix or define the offending template variable or tag, then resend

When it happens

Trigger: Thrown at packages/insomnia/src/network/network.ts:799 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Kong/insomnia@d9bb2b0142 (2026-08-26). Data as JSON: /api/errors/8c9c54f1680e952f. Report an issue: GitHub.

Appendix: source

Thrown at packages/insomnia/src/network/network.ts:799

  transientVariables?: Environment;
  ignoreUndefinedEnvVariable?: boolean;
}) => {
  try {
    return await getRenderedRequestAndContext({
      request: request,
      environment,
      baseEnvironment,
      userUploadEnvironment,
      transientVariables,
      purpose,
      extraInfo,
      ignoreUndefinedEnvVariable,
    });
  } catch (err) {
    if (err instanceof RenderError) {
      throw err;
    }
    throw new Error(`Failed to render request: ${request._id}`);
  }
};

export const tryToTransformRequestWithPlugins = async (renderResult: {
  request: RenderedRequest;
  context: Record<string, any>;
}) => {
  const { request, context } = renderResult;
  return await getRuntime().network.applyRequestHooks(request, context);
};

export interface sendCurlAndWriteTimelineError {
  _id: string;
  parentId: string;
  timelinePath: string;
  statusMessage: string;
  // additional
  url: string;

View on GitHub (pinned to d9bb2b0142)