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SUMMARY

Chromium cannot open network settings in Plasma 6, which can be opened in Plasma 5

STEPS TO REPRODUCE
1. Open Chromium, entering its settings
2. Click System -> Open your computer proxy settings（“打开您计算机的代理设置”）
3. You may see a window saying "无法从 /usr/bin/proxy 加载插件：Failed to extract plugin meta data from '/usr/bin/proxy': '/usr/bin/proxy' is not a Qt plugin (metadata not found)"

OBSERVED RESULT

A window titled "kcmshell6" saying "无法从 /usr/bin/proxy 加载插件：Failed to extract plugin meta data from '/usr/bin/proxy': '/usr/bin/proxy' is not a Qt plugin (metadata not found)"

EXPECTED RESULT

System proxy settings is opened as is worked in Plasma 5.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
ArchLinux 6.8.1-arch1-1 (64 bit)
KDE Plasma Version:  6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION
See https://bbs.archlinux.org/viewtopic.php?id=293966