I’m deploying n8n on Zeabur and trying to connect it to LINE Messaging API, but LINE webhook verification keeps failing with this error:
“An SSL connection error occurred.”
I believe this may be related to the SSL/TLS certificate or edge networking on the Zeabur domain side, because the application itself appears to be reachable.
My setup
- Service: n8n
- Region / Provider: Tencent Cloud Singapore
- Original domain: han8n-design-1-0.zeabur.app
- New domain tested: han8n-design-1-0b.zeabur.app
- Webhook URL currently used in LINE:
https://han8n-design-1-0b.zeabur.app/webhook/line-webhook
What I have already checked
- n8n service is running normally
- Webhook path is configured as:
- Method: POST
- Path: line-webhook
- I am using the Production URL, not the test URL
- I updated these environment variables:
- N8N_HOST=han8n-design-1-0b.zeabur.app
- N8N_PROTOCOL=https
- N8N_PROXY_HOPS=1
- WEBHOOK_URL=https://han8n-design-1-0b.zeabur.app/
- I restarted the n8n service after updating variables
- I also generated a brand new zeabur.app domain and retried verification
Browser test
When I open this URL in the browser:
https://han8n-design-1-0b.zeabur.app/webhook/line-webhook
I get this response:
{"code":404,"message":"This webhook is not registered for GET requests. Did you mean to make a POST request?"}
So the route appears reachable from the browser, but LINE still reports an SSL connection error during webhook verification.
Request
Could you please help check whether there is any SSL certificate / TLS handshake / edge proxy issue on the Zeabur domain side for this service?
If needed, I can provide more screenshots or logs.
Thank you.