Can't install printer, cups problem?
I had exactly the same problem and this worked for me:
sudo apt-get install cups --reinstall
sudo service cups restart
I met similar situation today and found this solution to be useful:
sudo apt-get install smbclient
refer_link
I had the same issue with my Canon MG8250 on a fresh Ubuntu 18.04
Using the cups web-interface enabled me to add the printer.
- open a browser and got to http://localhost:631/ . You will get a website Home - CUPS x.x.x
- Select "Adding Printers and Classes"
- Button "Add Printer"
At one point you will be asked for your user and password.