电子邮件模块在Ansible上失败

Question

我已经使用docker设置了Ansible容器。 我使用ybalt / ansible-tower：latest映像来部署容器。 我已经配置了所有内容，除了电子邮件模块之外，它们似乎都可以正常工作。 当剧本尝试发送电子邮件时，会弹出以下错误消息

"msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", "rc": 1

我重新检查配置，它们都很好。 我什至可以通过ansible塔中的通知模块发送邮件，就像我在剧本的电子邮件模块中使用的相同的smtp凭据一样。 我什至升级了容器内应用程序的版本，但似乎没有任何效果。 我已经给了具有sudo权限的机器凭证，甚至尝试了su级升级

完全错误

fatal: [Server]: FAILED! => {
    "changed": false, 
    "module_stderr": "Shared connection to x.x.x.x closed.\r\n", 
    "module_stdout": "\r\nTraceback (most recent call last):\r\n  File \"/home/ansible/.ansible/tmp/ansible-tmp-1549369654.27-211111564926363/AnsiballZ_mail.py\", line 113, in <module>\r\n    _ansiballz_main()\r\n  File \"/home/ansible/.ansible/tmp/ansible-tmp-1549369654.27-211111564926363/AnsiballZ_mail.py\", line 105, in _ansiballz_main\r\n    invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)\r\n  File \"/home/ansible/.ansible/tmp/ansible-tmp-1549369654.27-211111564926363/AnsiballZ_mail.py\", line 48, in invoke_module\r\n    imp.load_module('__main__', mod, module, MOD_DESC)\r\n  File \"/tmp/ansible_mail_payload_bQeVQh/__main__.py\", line 381, in <module>\r\n  File \"/tmp/ansible_mail_payload_bQeVQh/__main__.py\", line 330, in main\r\nTypeError: 'NoneType' object is not iterable\r\n", 
    "msg": "MODULE FAILURE\nSee stdo…

电子邮件模块配置

email_host: "smtp.sendgrid.net"
email_port: 587
email_username: "username"
email_password: "password"
email_to: "admin@example.com"
email_cc:
email_subject: "test"
email_body:
email_subtype: "html"
email_secure: "try"
email_from: "noreply@example.com ( Ansible Tower )"
email_bcc:
email_attach: 

手册中有关电子邮件模块手册的邮件发送部分

- name: Email body on failure
  set_fact:
    email_body="Hi {{ tower_user_name }}, <br><br> Status - Failed
                                                                  <br> Issue - Build path or given build name doesn't exist
                                                                  <br> Suggested Solution - Check the validity of the build path or the build name.
                                                                  <br><br> Thank You"

- name: Sending an email
  include_role:
    name: email
    tasks_from: main.yml
  when: path_build_location.stat.exists == False

我希望通过ansible塔将电子邮件发送到给定的电子邮件地址。 但反对弹出上述错误。 我在这里干什么，我已经尝试了很多事情，但是我不知道在上述情况下如何发生ansible模块故障。