Request failed with status code 500

[performpmontagens-create]

🐞 Bug: Error 500 when reading messages – markedUnread undefined (started today)

Description
Since today (2026-01-14, afternoon), WAHA started returning HTTP 500 errors when reading incoming messages.
Sending messages may still work, but reading / processing received messages fails.

Error message

TypeError: Cannot read properties of undefined (reading 'markedUnread')
at window.WWebJS.sendSeen

Full error

{
"statusCode": 500,
"exception": {
"message": "Cannot read properties of undefined (reading 'markedUnread')",
"name": "TypeError"
}
}

Context

Engine: WEBJS

Platform: Linux x64

Browser: Chromium

WAHA version: 2026.1.2

Error occurs when WAHA tries to mark messages as read (sendSeen)

Issue started without any code changes on our side

Expected behavior
WAHA should be able to read/process incoming messages without throwing a 500 error.

Notes
This looks like a breaking change in WhatsApp Web internal objects, where markedUnread is no longer available or the chat object is not initialized at read time.

[dg103]

I've been having the exact same problem since this morning. Can anyone help me fix it?

[performpmontagens-create]

I already tried updating WAHA to the latest version and restarting the session, but the issue still happens.
The error started today without any changes on my side, so it seems related to a WhatsApp Web change rather than an outdated WAHA version.

[umairabubakkar]

same issue facing

[performpmontagens-create]

I already tried updating WAHA to the latest version and restarting the session, but the issue still happens.
The error started today without any changes on my side, so it seems related to a WhatsApp Web change rather than an outdated WAHA version.

[madest754]

Try now to update, they released an update this morning and its working for me.

[suzukiahmed]

Same error , should i update waha?

[performpmontagens-create]

I already tried updating WAHA to the latest version and restarting the session, but the issue still happens.
The error started today without any changes on my side, so it seems related to a WhatsApp Web change rather than an outdated WAHA version.

[vinfosmart]

resolveu pra mim na mesma hora..... após fazer isso, reativei o post url de produção nas configurações do numero do whatsapp no waha. e foi.

Para atualizar o WAHA para a versão mais recente (atualmente 2025.11.x ou superior), use Docker Compose, já que sua configuração é baseada em docker-compose.yml com serviços como n8n, Postgres e Redis.
​

Versão Atual e Mais Nova
A imagem oficial é devlikeapro/waha:latest (ou waha-plus se premium). A latest stable é 2025.11.2, com fixes em GOWS stability e WEBJS contact names; verifique releases para a exata.
​
Comandos de Atualização
Execute no diretório do docker-compose.yml:

abra o terminal na pasta que esta o docker compose:

docker compose pull
docker compose up -d

Isso baixa a imagem mais nova e reinicia o container waha sem downtime significativo.

[github-actions[bot]]

English

---

it resolved it for me right away..... after doing this, I reactivated the production post url in the WhatsApp number settings on waha. and it was.

To update WAHA to the latest version (currently 2025.11.x or higher), use Docker Compose as its configuration is based on docker-compose.yml with services like n8n, Postgres and Redis.
​

Current and Newest Version
The official image is devlikeapro/waha:latest (or waha-plus if premium). The latest stable is 2025.11.2, with fixes in GOWS stability and WEBJS contact names; check releases for exact.
​
Update Commands
Run in the docker-compose.yml directory:

open the terminal in the folder where docker compose is:

docker compose pull
docker compose up -d

This downloads the newest image and restarts the waha container without significant downtime.

[germanmontedoro]

try to add country code number + 9 + phone number and so