What causes "Failed to sync GitHub file content. ${reason}" in Mintplex-Labs/anything-llm?

Check `reason` for the GitHub HTTP status (401/403/404).

Mintplex-Labs/anything-llm · error · Error

Failed to sync GitHub file content. ${reason}

Error message

Failed to sync GitHub file content. ${reason}

What it means

Thrown by resyncGithub in collector/extensions/resync/index.js:111 when fetchGithubFile(...) from collector/utils/extensions/RepoLoader/GithubRepo resolves with success:false. Inputs come from decrypting chunkSource — repoUrl, branch, accessToken (pat), sourceFilePath. The interpolated `reason` carries the upstream cause. Handler catches and answers HTTP 200 with success:false, content:null.

Source

Thrown at collector/extensions/resync/index.js:111

 */
async function resyncGithub({ chunkSource }, response) {
  if (!chunkSource) throw new Error("Invalid source property provided");
  try {
    // Github file data is `payload` encrypted (might contain PAT). So we need to expand its
    // encrypted payload back into query params so we can reFetch the page with same access token/params.
    const source = response.locals.encryptionWorker.expandPayload(chunkSource);
    const {
      fetchGithubFile,
    } = require("../../utils/extensions/RepoLoader/GithubRepo");
    const { success, reason, content } = await fetchGithubFile({
      repoUrl: `https:${source.pathname}`, // need to add back the real protocol
      branch: source.searchParams.get("branch"),
      accessToken: source.searchParams.get("pat"),
      sourceFilePath: source.searchParams.get("path"),
    });

    if (!success)
      throw new Error(`Failed to sync GitHub file content. ${reason}`);
    response.status(200).json({ success, content });
  } catch (e) {
    console.error(e);
    response.status(200).json({
      success: false,
      content: null,
    });
  }
}

/**
 * Fetches the content of a specific GitLab file via its chunkSource.
 * Returns the content as a text string of the file in question and only that file.
 * @param {object} data - metadata from document (eg: chunkSource)
 * @param {import("../../middleware/setDataSigner").ResponseWithSigner} response
 */
async function resyncGitlab({ chunkSource }, response) {
  if (!chunkSource) throw new Error("Invalid source property provided");

View on GitHub (pinned to 526360e320)

Solutions

Check `reason` for the GitHub HTTP status (401/403/404).
Re-scrape the GitHub file with a valid PAT that has `repo` scope (or fine-grained read on the repo) to mint a fresh chunkSource.
Verify the branch still exists and the file path is current.
Confirm the collector's egress to api.github.com (or the GH enterprise host) is allowed.

Defensive patterns

Strategy: try-catch

Try / catch

try { await resyncGithub({ chunkSource }, response); }
catch (e) {
  if (e.message.startsWith("Failed to sync GitHub file content.")) {
    const upstream = e.message.replace("Failed to sync GitHub file content. ", "");
    if (/401|403|bad credentials/i.test(upstream)) rotateGitHubPat();
    else if (/404/i.test(upstream)) markFileMovedOrDeleted();
    else if (/rate limit/i.test(upstream)) backoffAndRetry();
    else scheduleRetry();
  }
}

Prevention

Use a PAT with the minimum scope needed and rotate it before expiry.
Re-scrape to mint a new chunkSource whenever the PAT changes — old payloads carry the old token.
Watch for 404 — file moves are common in active repos.

When it happens

Trigger: PAT expired/revoked or lacks read on the repo; file moved or deleted on the branch; branch was renamed/deleted; private repo with no token; GitHub API rate limit (60/hr unauthenticated); repo transferred to another owner.

Common situations: Personal Access Token rotated since original scrape; file path changed in a refactor; repo transferred/renamed; classic PAT scoped to a different repo.

Related errors

AI-assisted analysis of Mintplex-Labs/anything-llm@526360e320 (2026-08-13). Data as JSON: /api/errors/3fdff0449b372038. Report an issue: GitHub.