执行了一下deepin-home-appstore-client命令:

================== 程序启动 ================== QTime("20:41:36.301") load translate "/usr/share/libdtk-5.6.4/DWidget/translations/dtkwidget_zh_CN" load translate "/usr/share/deepin-home-appstore-client/translations/deepin-home-appstore-client_zh_CN" 2023-04-24, 20:41:36.442 [Info ] =========deepin-app-store version========= "7.5.2.0007" 2023-04-24, 20:41:36.444 [Info ] Failed to register dbus object QDBusError("", "") 2023-04-24, 20:41:36.444 [Warning] DGuiApplicationHelper::instance()->setSingleInstance

尝试过

sudo apt remove deepin-app-store

sudo apt install deepin-app-store

都不行.

应该是商店后台服务器无法访问。终端执行 ping appstore.uniontech.com，看下域名解析出来的 IP 地址是啥。正常地址应该是 101.37.43.176。

P.S. 如果 IP 地址解析出来不是这个，在控制中心->网络里面，选择你使用的网络连接，点击右侧箭头修改 DNS 服务器为 114.114.114.114 再试试。
P.S. 目前遇到最神奇的现象是，IP 地址解析没有任何问题，但是就是无法访问商店服务器......这种奇葩问题只能找对应的网管或者宽带运营商问问了......

那我应该是遇上了.

ping appstore.uniontech.com PING appstore.uniontech.com (101.37.43.176) 56(84) bytes of data. 64 bytes from 101.37.43.176 (101.37.43.176): icmp_seq=1 ttl=35 time=30.9 ms 64 bytes from 101.37.43.176 (101.37.43.176): icmp_seq=2 ttl=35 time=30.9 ms 64 bytes from 101.37.43.176 (101.37.43.176): icmp_seq=3 ttl=35 time=30.1 ms ^X64 bytes from 101.37.43.176 (101.37.43.176): icmp_seq=4 ttl=35 time=30.9 ms ^C --- appstore.uniontech.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 7ms rtt min/avg/max/mdev = 30.070/30.678/30.914/0.393 ms

已解决,已解决,感谢 "忘记、过去"版主.

原因是我系统不小心配置了一个错误的代理,导致应用商店走这个代理走不通,关掉就好了.感谢@忘记、过去