Does not start

[vanillajonathan]

If the locale is not en_US then Sphereview crashes on startup.

$ flatpak run io.github.dynobo.sphereview

(process:2): Gtk-WARNING **: 13:43:56.874: Locale not supported by C library.
	Using the fallback 'C' locale.

(process:2): Adwaita-WARNING **: 13:43:56.913: Using GtkSettings:gtk-application-prefer-dark-theme with libadwaita is unsupported. Please use AdwStyleManager:color-scheme instead.
flatpak-spawn: Invalid byte sequence in conversion input
Try "flatpak-spawn --help" for more information.

** (sphereview:2): ERROR **: 13:43:57.578: readPIDFromPeer: Unexpected short read from PID socket. (This usually means the auxiliary process crashed immediately. Investigate that instead!)