N8N Send Message and wait: Reply invalid token (webhook-waiting)

[biovolt]

Hi
I have a few workflows that use Telegram to send info and ask for confirmation.

IT used to work perfectly. But now suffenly I get {“error”:“Invalid token”} as a response when trying to approve, devline or complete a webform in n8n

What can the cause be?
My credentials and workflows are reading correctly, and I can receive normal Telegram messages via triggers

But a simple Workflow like this is not working anymore

I tried adding a new Bot nd new credentials

I have set
Webhook URLs
Environment=“WEBHOOK_TUNNEL_URL=https://asdsasdasdt.ngrok-free.app”
Environment=“WEBHOOK_URL=https://asdsasdasdt.ngrok-free.app”

N8N version: 1.106.3
Self Hosted

Any help will be appreciated
EDIT: When I tried it on an older version, it worked. Could it be a bug in 1.106.3?

Information on your n8n setup

• n8n version: 1.106.3

• Database (default: SQLite): Testes both SQLite & PostgreSQL

• n8n EXECUTIONS_PROCESS setting (default: own, main):

• Running n8n via (Docker, npm, n8n cloud, desktop app):npm

• Operating system: Debain

[biovolt]

I tried switching to use Slack.
But I get the same error when clicking the button

[Allies_R]

I found same issue on n8n form. i tried regenerate token and check no expire

[biovolt]

@Allies_R, did your n8n also start doing this after an upgrade?

[Allies_R]

I not remember after upgrade to 1.106 version have test workflow. but now 1.107 lastest version same issue

[cutecatcode]

If you want to use Telegram, you can revoke the token from BotFather first, then change your Telegram bot token to the newest token from BotFather

[Allies_R]

I rollback to 1.105.4 version success workflow

[biovolt]

Thank you
Can you just uninstall n8n and install 1.105.4?

[biovolt]

Thank you
I tried this, but it does not solve the error. The same occurs when using Slack. It is not the Slack or Telegram token.
I think it is this https://github.com/n8n-io/n8n/pull/17566 that broke it.
N8N added a token to the sendAndWait webhook to add more security, and something is breaking.

Please go and add a comment here to help speed up the fix

sendAndWait Broken with missing/invalid token

[Allies_R]

@biovolt

Can you just uninstall n8n and install 1.105.4?

Yes I can uninstall lastest version and pull image 1.105.4 that sit