【已完成】docker管理器报错

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面板、插件版本：面板版本:7.9.9   Docker管理器: 3.9.0

系统版本：centos7.6

问题描述：

相关截图（日志、错误）：REQUEST_DATE: 2023-05-10 21:22:32 PAN_VERSION: 7.9.9  OS_VERSION: CentOS  7.9.2009 x86_64(Py3.7.9) REMOTE_ADDR: 120.36.101.88 REQUEST_URI: POST /plugin%3Faction%3Da%26amp%3Bname%3Ddocker%26amp%3Bs%3DGetConListREQUEST_FORM: {}  USER_AGENT: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36Traceback (most recent call last):  File "class/panelPlugin.py", line 3121, in a    return p.exec_fun(get)  File "class/pluginAuth.py", line 67, in exec_fun    raise public.PanelError(res['msg'])public.PanelError: 面板运行时发生错误: Traceback (most recent call last):  File "/www/server/panel/plugin/docker/docker_main.py", line 59, in GetConList    for con in self.__docker.containers.list(all=True):AttributeError: 'NoneType' object has no attribute 'containers'

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