【已完成】邮局安装报错，无法安装完成

PAN_VERSION: 7.9.4  OS_VERSION: CentOS  7.9.2009 x86_64(Py3.7.9) REMOTE_ADDR: 27.189.148.15 REQUEST_URI: POST /plugin?action=install_pluginREQUEST_FORM: {'sName': 'mail_sys', 'version': '4', 'min_version': '7'}  USER_AGENT: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36Traceback (most recent call last):  File "/www/server/panel/BTPanel/__init__.py", line 1824, in publicObject    return run_exec().run(toObject, defs, get)  File "/www/server/panel/BTPanel/__init__.py", line 1776, in run    result = getattr(toObject,get.action)(get)  File "/www/server/panel/class/panelPlugin.py", line 744, in install_plugin    result = self.install_sync(pluginInfo,get)  File "/www/server/panel/class/panelPlugin.py", line 788, in install_sync    return self.__install_plugin(pluginInfo['name'], get.version)  File "/www/server/panel/class/panelPlugin.py", line 90, in __install_plugin    filename = self.__download_plugin(upgrade_plugin_name,upgrade_version)  File "/www/server/panel/class/panelPlugin.py", line 538, in __download_plugin    raise public.PanelError('软件包下载失败，请重试')public.PanelError: 面板运行时发生错误: 软件包下载失败，请重试

感谢，已经搞定