The install procedure cannot find the Canon GX7021. I followed the procedure described in the "IJ Printer Driver for Linux (Operation guide)".
The printer is definitely on the network and turned on. The command "lpinfo -v" finds it:
network dnssd://Canon-GX7021._ipp._tcp.local/?uuid=00000000-0000-1000-8000-0018a8016a14
...
network ipps://Canon-GX7021._ipps._tcp.local/
But the installation program does not find it. Specifically, /usr/lib/cups/backend/cnijbe2 and /usr/lib64/cups/backend/cnijbe2 do not produce any output.
