I recently tried upgrading to 2.1.65, but would get this error message if I tried to run it. This also happened when I had tried to upgrade to 2.1.63, although I don’t have the error message for that. (IIRC, it was similar.)
Anki starting...
Initial setup...
Running with temporary Qt5 compatibility shims.
Run with DISABLE_QT5_COMPAT=1 to confirm compatibility with Qt6.
Preparing to run...
Qt info: Could not load the Qt platform plugin "xcb" in "" even though it was found.
Qt fatal: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, xcb, vnc, linuxfb, vkkhrdisplay, minimalegl, minimal, offscreen, wayland-egl, wayland.
Aborted (core dumped)