我很抱歉听到你遇到麻烦。请你通过电子邮件与我们联系： contact@esotericsoftware.com
当你发送电子邮件时，如果你能描述你在试图打开发票PDF时收到的具体错误信息，我们将非常感激。
I'm sorry to hear you're having trouble. Could you please contact us via email?: contact@esotericsoftware.com
When you send the email, we would appreciate it if you could describe the specific error message you received when you tried to open the invoice PDF.
