Failing to login with AppImage on my linux system

[ll931217]

I got the following error message:

[App] Unhandled rejection at: Promise {
  <rejected> Error: Cannot find channel "latest-linux.yml" update info: HttpError: 404
  "method: GET url: https://cdn.21st.dev/releases/desktop/latest-linux.yml?noCache=1jgbmtapn\n\nPlease double check that your authentication token is correct. Due to security reasons, actual status maybe not reported, but 404.\n"
  Headers: {
    "cf-cache-status": "DYNAMIC",
    "cf-ray": "9c6ea8b209fee373-NRT",
    "content-encoding": "br",
    "content-type": "text/html",
    "date": "Sun, 01 Feb 2026 04:20:54 GMT",
    "nel": "{\"report_to\":\"cf-nel\",\"success_fraction\":0.0,\"max_age\":604800}",
    "report-to": "{\"group\":\"cf-nel\",\"max_age\":604800,\"endpoints\":[{\"url\":\"https://a.nel.cloudflare.com/report/v4?s=bxY9LUwHSToplq6zAJiP9PBX3JvBgcauzrPAiqfG4BkhfQeSRqCdGxmXyhwT917R12KulHIyiTzbCRdU46KX70eF6323v2Z6xnG4\"}]}",
    "server": "cloudflare",
    "server-timing": "cfCacheStatus;desc=\"DYNAMIC\", cfEdge;dur=3,cfOrigin;dur=198",
    "vary": "Accept-Encoding"
  }
      at createHttpError (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/httpExecutor.js:21:12)
      at ElectronHttpExecutor.handleResponse (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/httpExecutor.js:121:20)
      at ClientRequest.<anonymous> (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/httpExecutor.js:87:26)
      at ClientRequest.emit (node:events:519:28)
      at SimpleURLLoaderWrapper.<anonymous> (node:electron/js2c/browser_init:2:124429)
      at SimpleURLLoaderWrapper.emit (node:events:519:28)
      at newError (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/error.js:5:19)
      at GenericProvider.getLatestVersion (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/out/providers/GenericProvider.js:27:63)
      at async AppImageUpdater.getUpdateInfoAndProvider (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/out/AppUpdater.js:389:19)
      at async AppImageUpdater.doCheckForUpdates (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/out/AppUpdater.js:402:24) {
    code: 'ERR_UPDATER_CHANNEL_FILE_NOT_FOUND'
  }
} reason: Error: Cannot find channel "latest-linux.yml" update info: HttpError: 404
"method: GET url: https://cdn.21st.dev/releases/desktop/latest-linux.yml?noCache=1jgbmtapn\n\nPlease double check that your authentication token is correct. Due to security reasons, actual status maybe not reported, but 404.\n"
Headers: {
  "cf-cache-status": "DYNAMIC",
  "cf-ray": "9c6ea8b209fee373-NRT",
  "content-encoding": "br",
  "content-type": "text/html",
  "date": "Sun, 01 Feb 2026 04:20:54 GMT",
  "nel": "{\"report_to\":\"cf-nel\",\"success_fraction\":0.0,\"max_age\":604800}",
  "report-to": "{\"group\":\"cf-nel\",\"max_age\":604800,\"endpoints\":[{\"url\":\"https://a.nel.cloudflare.com/report/v4?s=bxY9LUwHSToplq6zAJiP9PBX3JvBgcauzrPAiqfG4BkhfQeSRqCdGxmXyhwT917R12KulHIyiTzbCRdU46KX70eF6323v2Z6xnG4\"}]}",
  "server": "cloudflare",
  "server-timing": "cfCacheStatus;desc=\"DYNAMIC\", cfEdge;dur=3,cfOrigin;dur=198",
  "vary": "Accept-Encoding"
}
    at createHttpError (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/httpExecutor.js:21:12)
    at ElectronHttpExecutor.handleResponse (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/httpExecutor.js:121:20)
    at ClientRequest.<anonymous> (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/httpExecutor.js:87:26)
    at ClientRequest.emit (node:events:519:28)
    at SimpleURLLoaderWrapper.<anonymous> (node:electron/js2c/browser_init:2:124429)
    at SimpleURLLoaderWrapper.emit (node:events:519:28)
    at newError (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/node_modules/builder-util-runtime/out/error.js:5:19)
    at GenericProvider.getLatestVersion (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/out/providers/GenericProvider.js:27:63)
    at async AppImageUpdater.getUpdateInfoAndProvider (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/out/AppUpdater.js:389:19)
    at async AppImageUpdater.doCheckForUpdates (/tmp/.mount_1Code-s37E6K/resources/app.asar/node_modules/electron-updater/out/AppUpdater.js:402:24) {
  code: 'ERR_UPDATER_CHANNEL_FILE_NOT_FOUND'
}

When I make the request to latest-linux.yml, I got 404, but latest-mac.yml works.

[1code-async]

Task completed.

I've posted a detailed analysis comment on GitHub issue #150. Here's a summary of what I found:

Root Cause: The latest-linux.yml manifest file doesn't exist on the CDN. The manifest generation script (scripts/generate-update-manifest.mjs) only creates macOS manifests - there's no Linux manifest generation implemented yet.

Key Findings:

• Linux packaging (AppImage/deb) is configured in package.json:232-239
• Auto-update CDN is configured at https://cdn.21st.dev/releases/desktop
• The manifest script only handles latest-mac.yml and latest-mac-x64.yml

Fix Required: The project needs to extend the manifest generation script to also create latest-linux.yml and upload Linux artifacts during releases.

I also asked the user to clarify whether the login issue is separate from this auto-update error, since the issue title mentions "Failing to login" but the error is specifically about auto-updates.

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Task completed.

PR Review for Issue #150

There's no open PR for this issue, but here's the root cause analysis and what a fix needs:

Root Cause

The auto-updater is configured for Linux (package:linux builds AppImage/DEB), but no latest-linux.yml manifest is ever generated or uploaded to the CDN. The manifest generation script (scripts/generate-update-manifest.mjs) only handles macOS (arm64 + x64). When the AppImage launches, electron-updater hits https://cdn.21st.dev/releases/desktop/latest-linux.yml and gets a 404, causing an unhandled rejection that blocks the app.

Two things need fixing:

1. Immediate fix — Catch the ERR_UPDATER_CHANNEL_FILE_NOT_FOUND error gracefully in src/main/lib/auto-updater.ts so the app doesn't crash when no manifest exists. The error handler should log and continue, not reject unhandled.

2. Proper fix — Either:

   • Extend scripts/generate-update-manifest.mjs to produce latest-linux.yml (and latest-linux-x64.yml if needed) and update the upload script to push Linux artifacts to R2, or
   • Disable auto-update checks on Linux until Linux releases are officially supported.

Relevant files:

• src/main/lib/auto-updater.ts — error handling gap
• scripts/generate-update-manifest.mjs — macOS-only manifest generation
• package.json — publish config applies to all platforms but only macOS manifests exist

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[1code-async]

Issue Analysis

Thanks for reporting this! This is a known gap in Linux auto-update support.

Root Cause

The auto-updater is trying to fetch latest-linux.yml from the CDN, but this manifest file doesn't exist. Looking at the codebase:

1. Linux packaging is configured in package.json:232-239 - AppImage and deb formats are set up correctly
2. Auto-update CDN is configured in package.json:246-249 pointing to https://cdn.21st.dev/releases/desktop
3. However, the manifest generation script (scripts/generate-update-manifest.mjs) only generates macOS manifests (latest-mac.yml and latest-mac-x64.yml)

The script explicitly only handles:

• latest-mac.yml (arm64)
• latest-mac-x64.yml (x64)

There's no code to generate latest-linux.yml for AppImage updates.

Relevant Files

File	Purpose
scripts/generate-update-manifest.mjs	Manifest generation (macOS only)
src/main/lib/auto-updater.ts	Auto-updater implementation
package.json:232-239	Linux build targets config

Workaround

The app itself should still work - this error occurs because electron-updater tries to check for updates on startup. The login functionality is separate from the auto-updater, so if you're having trouble logging in, there may be an additional issue. Can you clarify:

1. Does the app launch and show the login screen?
2. What happens when you click the login button?

Fix Required

To fully resolve this, the project needs to:

1. Update scripts/generate-update-manifest.mjs to also generate latest-linux.yml
2. Upload the Linux manifest and AppImage to the CDN during releases

Related

• Issue electron-builder: Missing author email in package.json for .deb package generation #18 also relates to Linux packaging (missing author email for .deb generation)

[ll931217]

Issue Analysis

Thanks for reporting this! This is a known gap in Linux auto-update support.

Root Cause

The auto-updater is trying to fetch latest-linux.yml from the CDN, but this manifest file doesn't exist. Looking at the codebase:

1. Linux packaging is configured in package.json:232-239 - AppImage and deb formats are set up correctly
2. Auto-update CDN is configured in package.json:246-249 pointing to https://cdn.21st.dev/releases/desktop
3. However, the manifest generation script (scripts/generate-update-manifest.mjs) only generates macOS manifests (latest-mac.yml and latest-mac-x64.yml)

The script explicitly only handles:

• latest-mac.yml (arm64)
• latest-mac-x64.yml (x64)

There's no code to generate latest-linux.yml for AppImage updates.

Relevant Files

File Purpose
scripts/generate-update-manifest.mjs Manifest generation (macOS only)
src/main/lib/auto-updater.ts Auto-updater implementation
package.json:232-239 Linux build targets config

Workaround

The app itself should still work - this error occurs because electron-updater tries to check for updates on startup. The login functionality is separate from the auto-updater, so if you're having trouble logging in, there may be an additional issue. Can you clarify:

1. Does the app launch and show the login screen?
2. What happens when you click the login button?

Fix Required

To fully resolve this, the project needs to:

1. Update scripts/generate-update-manifest.mjs to also generate latest-linux.yml
2. Upload the Linux manifest and AppImage to the CDN during releases

Related

• Issue electron-builder: Missing author email in package.json for .deb package generation #18 also relates to Linux packaging (missing author email for .deb generation)

1. When launching the app, it shows the login screen
2. When clicking the login button, it opens a link in my default browser to login and authorize the app.