Just in case anyone may see this in the future, I’d like to throw in a little bit of extra information that I think is helpful.
Arc Menu is a Gnome extension that adds a Windows/KDE style launcher and icon to the Gnome desktop, typically it is used in tandem with the Dash to Panel extension as well for the best experience. One thing to note, there are two versions of Arc Menu within the Gnome extensions website; one is actively developed and one is no longer maintained. The actively maintained one is available here: https://extensions.gnome.org/extension/3628/arcmenu/
As it states on that extension page, you must also install gir1.2-gmenu-3.0 or gnome-menus for Arc Menu to function properly. I’ve always installed the gir1.2-gmenu-3.0 package and got Arc Menu working just fine; for OP the gnome-menus package worked for them, either one is fine, you don’t need both, FYI. Enjoy using Gnome