[Bug]: Telegram notification doesn't work after adding env variables

[gavined1]

问题描述 | Describe the bug

Telegram notifications are not working after adding the necessary environment variables and redeploying the service on Vercel.

When a comment is posted, the API returns a 200 status code, but the notification is not sent to Telegram.

Additionally, the Vercel Function logs show configuration warnings/errors related to the database connection (TiDB via MySQL2 protocol):

• Ignoring invalid configuration option passed to Connection: acquireWaitTimeout
• Ignoring invalid configuration option passed to Connection: handle
• Ignoring invalid configuration option passed to Connection: prefix

复现步骤 | Steps to reproduce

1. Add Telegram bot token and chat ID environment variables.
2. Redeploy the Waline service on Vercel.
3. Post a new comment on the website.
4. No notification is received in the Telegram chat, even though the comment is successfully created (API returns 200).

期望行为 | Expected behavior

Telegram notification should be sent successfully after a comment is posted.

相关的日志数据 | Relevant log output

03:58:43.568 Ignoring invalid configuration option passed to Connection: acquireWaitTimeout. This is currently a warning, but in future versions of MySQL2, an error will be thrown...
03:58:43.568 Ignoring invalid configuration option passed to Connection: handle. This is currently a warning, but in future versions of MySQL2, an error will be thrown...
03:58:43.568 Ignoring invalid configuration option passed to Connection: prefix. This is currently a warning, but in future versions of MySQL2, an error will be thrown...

环境信息 | Environment

• Waline version: (Latest)
• Deployment: Vercel
• Database: TiDB
• Website URL: https://gavined.com/ (API: https://api.gavined.com/) (Auth: https://auth.gavined.com/)

Screenshot

问题网站 | Website URL

https://gavined.com/

服务部署在哪里？ | Where your waline deploy?

Vercel (Default)

数据存储在哪里？| Where your comment data store?

TiDB

[gavined1]

###New issue logs

Telegram Notification Failed:{"ok":false,"error_code":400,"description":"Bad Request: message text is empty"}

[lizheming]

Those three lines of red error messages are unrelated to the Telegram notification; they indicate a database connection problem, but they do not affect the operation of Waline.

The error message indicates that the message content is empty. Have you defined the TGTemplate environment variable? If so, you can try deleting it. Also, Telegram doesn't support many characters, and the rules are difficult to predict. You can try using comments containing only English characters.