Hello.
I have recently had to do a clean install of Mojave. After the install I pulled RW from time capsule. First I was surprised that all the plugins were gone. I then had to add the SN and re-install all the plugin(foundry, potion, animagic, stack) the installer indicated success but when I try to use RW to open my site the plugins are not found.
I don’t think anyone has ever explained how to reinstall all the pieces from a Time Machine backup properly;-)
Probably because everyone has a different idea where to keep their stuff. It really should be standardized, for clarity…