Starting the XFCE desktop

[explodersname]

I have installed arch linux with xfxe via the provided the script and rujning the XFCE start script installs the XFCE desktop environment then downgrades the tiger vnc package which gives me this output:
warning: downgrading package tigervnc (1.11.0-5 => 1.10.1-1) error: failed to prepare transaction (package architecture is not valid) :: package tigervnc-1.10.1-1-aarch64 does not have a valid architecture
What should I do?