Telegram Trigger Webhook Issue

Questions
,
1

Describe the problem/error/question

When I try to test the trigger of the telegram trigger I got the following Error:

What is the error message (if any)?

Problem running workflow
Bad request - please check your parameters
Show Details
Telegram Trigger: Bad Request: bad webhook: Failed to resolve host: Temporary failure in name resolution

Please share your workflow

Share the output returned by the last node

this is the first node in the workflow

Information on your n8n setup

  • n8n version: 1.86.1
  • n8n internal port: 8443
  • n8n external port: 8443
  • n8n host: my own dns
  • n8n protocol: https
  • Database (default: SQLite): Postgresql:17.4-alpine
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Docker on VPS
  • Operating system: Ubuntu 24.04
2

Seems the container can’t resolve DNS entries. You can check with the HTTP node if https://api.telegram.org is available.

3

你可以详细讲讲吗？我也遇到了同样的问题。
Could you please explain in detail? I have encountered the same problem. :slightly_smiling_face:

4

Same problem here, guys.
I’ve been facing this issue since n8n version 1.84 or so.

I can use the bot a few times and then it stops, forcing me to recycle the API token or create another bot.

5

To understand what’s going on and pinpoint where the problem lies, we can trace the flow.

Normally, when you set up Telegram Trigger, it creates a webhook and assigns it to the telegram bot.

To confirm that the webhook is active, you can request it :
https://api.telegram.org/bot<YOUR_TOKEN>/getWebhookInfo

image
image587×451 41.2 KB

From the screenshot, in my case, it’s clear that everything is fine there.

So, I believe this is the key to debugging and determining where the problem lies.

6

Switching to a Webhook node instead of the Telegram trigger, I’m still facing the same problem as it suddenly started to error.

Register Your Webhook:
POST Method
https://api.telegram.org/bot[YOURBOTTOKEN]/setWebhook?url=[YOURWEBHOOK]

Delete Your Webhook (Set empty string on url webhook):
POST Method
https://api.telegram.org/bot[YOURBOTTOKEN]/setWebhook?url=

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