[SOLVED] Computer and printer "not talking"

Running Mageia 9. I have just bought a Brother MFC printer. The online software installed without any real problems. The model number is too recent for CUPS, which put the printer on a USB address, although it is configured for Wi-fi, and cannot be edited.
The MFC shows up in Mageia's hardware, but I can't print to it. The message is
There are many discussions of this issue on the Web, but they all seem to boil down to "Try anything, and keep trying until it works." My first thought was to delete the printer and start again but CUPS changes me to myself, instead of Root.
The MFC shows up in Mageia's hardware, but I can't print to it. The message is
- Code: Select all
Waiting for the printer to become available.
There are many discussions of this issue on the Web, but they all seem to boil down to "Try anything, and keep trying until it works." My first thought was to delete the printer and start again but CUPS changes me to myself, instead of Root.