These cronjobs have components that require information about your current display to display notifications correctly.
When you add them as cronjobs, I recommend you precede the command with commands as those below:
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u $USER)/bus; export DISPLAY=:0; . $HOME/.zprofile; then_command_goes_here
This ensures that notifications will display, xdotool commands will function and environmental variables will work as well.