qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""

[mk-pmb]

OS Version (系统版本)

Linux

Version Details (版本信息)

v1.1.1-build.543

Describe the bug (问题描述)

$ ./ModManager-v1.1.1-build.543.AppImage
qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Aborted

To Reproduce (复现问题)

Download AppImage, run on Ubuntu focal with xfce4.

Expected behavior (预期行为)

A GUI window appears.

This issue is unique (这个issue是唯一的)

• I have searched the issue tracker and did not find an issue describing my bug.

Additional context (额外说明)

No response