[WEBJS] - Endpoint /api/sendImage returns 500 Internal Server Error "upload failed: media entry was not created" in Channels

[lorenzo-bb]

Describe the bug

We updated WAHA from version 2025.12.1 to 2025.12.2. Since then, posting an image to a WhatsApp channel returns the error in the object. Updating to latest 2026.1.1 did not solve the issue, reverting to 2025.12.1 solved it.

Version

The error probably occurs since:

{
  "version": "2025.12.2",
  "engine": "WEBJS",
  "tier": "PLUS",
  "browser": "/usr/bin/chromium"
}

Request / Response

I could reproduce the error in the Swagger GUI, returning following response (in this case after updating to 2026.1.1):

{
  "statusCode": 500,
  "timestamp": "2026-01-06T10:18:51.324Z",
  "exception": {
    "message": "upload failed: media entry was not created\nnew Error (<anonymous>:6:31)\nwindow.WWebJS.processMediaData (pptr:evaluate;WPage.evaluate%20(%2Fapp%2Fdist%2Fcore%2Fengines%2Fwebjs%2FWPage.js%3A13%3A36):522:19)",
    "name": "Error",
    "stack": "Error: upload failed: media entry was not created\nnew Error (<anonymous>:6:31)\nwindow.WWebJS.processMediaData (pptr:evaluate;WPage.evaluate%20(%2Fapp%2Fdist%2Fcore%2Fengines%2Fwebjs%2FWPage.js%3A13%3A36):522:19)\n    at window.WWebJS.processMediaData (evaluate at WPage.evaluate (/app/dist/core/engines/webjs/WPage.js:13:36), <anonymous>:521:18)\n    at #evaluate (/app/node_modules/puppeteer-core/lib/cjs/puppeteer/cdp/ExecutionContext.js:391:56)\n    at async ExecutionContext.evaluate (/app/node_modules/puppeteer-core/lib/cjs/puppeteer/cdp/ExecutionContext.js:277:16)\n    at async IsolatedWorld.evaluate (/app/node_modules/puppeteer-core/lib/cjs/puppeteer/cdp/IsolatedWorld.js:100:16)\n    at async CdpFrame.evaluate (/app/node_modules/puppeteer-core/lib/cjs/puppeteer/api/Frame.js:362:20)\n    at async CdpPage.evaluate (/app/node_modules/puppeteer-core/lib/cjs/puppeteer/api/Page.js:818:20)\n    at async WPage.evaluate (/app/dist/core/engines/webjs/WPage.js:13:20)\n    at async WebjsClientPlus.sendMessage (/app/node_modules/whatsapp-web.js/src/Client.js:1100:25)\n    at async descriptor.value (/app/dist/core/abc/activity.js:9:20)\n    at Error (:5:30)"
  },
  "request": {
    "path": "/api/sendImage",
    "method": "POST",
    "body": {
      "chatId": "***@newsletter",
      "file": {
        "mimetype": "image/jpeg",
        "filename": "filename.jpg",
        "url": "https://picsum.photos/200/300"
      },
      "reply_to": null,
      "caption": "a caption",
      "session": "***"
    },
    "query": {}
  },
  "version": {
    "version": "2026.1.1",
    "engine": "WEBJS",
    "tier": "PLUS",
    "browser": "/usr/bin/chromium",
    "platform": "linux/x64"
  }
}

Additional context

I suppose the error comes with the update of the devlikeapro/whatsapp-web.js package in version 2025.12.2.
I see the project is a fork of pedroslopez/whatsapp-web.js and I found a similar recent issue there: pedroslopez/whatsapp-web.js#5693
I hope this helps.

[danielmwxx]

@lorenzo-bb Thanks for the information, reverting to version 2025.12.1 solved my problem.

[devlikepro]

✅ Ready and available in dev images:

• devlikeapro/waha-plus:dev — make sure to select the engine via the environment variable

• devlikeapro/waha-plus:dev-arm

🕛 Note: Dev images are published nightly at 00:00 UTC, so new builds become available right after midnight UTC.

🚀 Will be included in the next release!

[devlikepro]

2026.1.2 - WEBJS - fix send media to channels - #1775