Vala-Panel And its derivatives won't install

[screenshot removed]

I’m trying to customize xfce on macOS Big Sur and as a very newbie I need some guidance on this and also here is a link to a clip https://youtu.be/uvvoJU69uNo?si=ezyBolpccluUzUic customization in case it’s required
And since I use Arabic this translation

pamac build vala-panel-appmenu-common-git vala-panel-appmenu-registrar-git vala-panel-appmenu-xfce-git
sudo pacman -S appmenu-gtk-module
Failed to read AUR data from /var/lib/pacman/sync/packages-meta-ext-v1.json.gz : Error opening file /var/lib/pacman/sync/packages-meta-ext-v1.json.gz: No such file or directory
Failed to read AUR data from /var/lib/pacman/sync/packages-meta-ext-v1.json.gz : Error opening file /var/lib/pacman/sync/packages-meta-ext-v1.json.gz: No such file or directory
Failed to read AUR data from /var/lib/pacman/sync/packages-meta-ext-v1.json.gz : Error opening file /var/lib/pacman/sync/packages-meta-ext-v1.json.gz: No such file or directory
Failed to read AUR data from /var/lib/pacman/sync/packages-meta-ext-v1.json.gz : Error opening file /var/lib/pacman/sync/packages-meta-ext-v1.json.gz: No such file or directory
Error: Target not found: vala-panel-appmenu-registrar-git
Error: Target not found: vala-panel-appmenu-common-git
Error: Target not found: vala-panel-appmenu-xfce-git

I hope to help, and if there are articles and clips for beginners, include them. I will be very grateful.

Mod edit: removed screenshot as the text translation is sufficient. Formatted command output