网站已稳定运行200多天，前几天更新升级了面板，今天发现这个问题
1Panel 版本：2.1.13
操作系统(设备)： debian12
关键截图：
日志：1Panel-openresty-lBAc | 2026/06/01 09:42:33 [emerg] 1#1: host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | nginx: [emerg] host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | 2026/06/01 09:43:33 [emerg] 1#1: host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | nginx: [emerg] host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | 2026/06/01 09:44:34 [emerg] 1#1: host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | nginx: [emerg] host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | 2026/06/01 09:45:34 [emerg] 1#1: host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2
1Panel-openresty-lBAc | nginx: [emerg] host not found in upstream “f.ppt2.cn” in /www/sites/d.wuweibike.com/proxy/down.conf:2