n8n v1.88.0运行工作流报错：Telegram Trigger无效Webhook URL

报错信息 #

工作流运行提示 #

Problem running workflow
Bad request - please check your parameters

Show Details
Telegram Trigger: Bad Request: invalid webhook URL specified

控制台输出 #

400 Bad Request: invalid webhook URL specified
Node does not have any credentials set
Node does not have any credentials set
Bad request - please check your parameters
400 - {"ok":false,"error_code":400,"description":"Bad Request: invalid webhook URL specified"}
NodeApiError Bad request - please check your parameters
Bad request - please check your parameters
400 - {"ok":false,"error_code":400,"description":"Bad Request: invalid webhook URL specified"}
NodeApiError Bad request - please check your parameters
Bad request - please check your parameters
400 - {"ok":false,"error_code":400,"description":"Bad Request: invalid webhook URL specified"}
NodeApiError Bad request - please check your parameters
Bad request - please check your parameters
400 - {"ok":false,"error_code":400,"description":"Bad Request: invalid webhook URL specified"}
NodeApiError Bad request - please check your parameters
Bad request - please check your parameters
400 - {"ok":false,"error_code":400,"description":"Bad Request: invalid webhook URL specified"}
NodeApiError Bad request - please check your parameters
400 Bad Request: invalid webhook URL specified

问题分析 #

控制台明确输出Node does not have any credentials set，说明Telegram触发器节点未配置有效凭据，这是核心问题之一；同时invalid webhook URL specified表明Webhook URL不符合Telegram要求，可能原因包括：

• URL未使用HTTPS协议（Telegram强制要求Webhook地址为HTTPS）
• URL无法被Telegram服务器访问（本地测试需用ngrok等隧道工具暴露HTTPS地址）
• n8n的WEBHOOK_URL环境变量未正确设置，导致生成的Webhook地址无效

1.88.0版本的n8n Telegram节点无已知Webhook配置致命bug，优先排查配置问题而非版本。

排查步骤 #

• 配置Telegram凭据：检查Telegram触发器节点，确保已添加有效的Bot Token并选中该凭据
• 验证Webhook URL：
  1. 确认n8n的WEBHOOK_URL环境变量已设置为可公开访问的HTTPS地址
  2. 用浏览器或curl命令测试URL是否能正常响应
  3. 确保URL无特殊字符、路径正确
• 重新部署工作流：删除现有Telegram触发器，重新添加配置后保存并部署工作流

内容的提问来源于stack exchange，提问作者Ahmad Nabhan