(Wayland) Xfce4-Taskmanager don't start

(xfce4-taskmanager:3708): Wnck-WARNING **: 10:04:57.395: libwnck is designed to work in X11 only, no valid display found

Segmentation fault

(xfce4-taskmanager 1.5.5 and xfce4-taskmanager git)