Workaround, add the key manually: sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E5E86C008AA65D56
gpg: requesting key 8AA65D56 from hkp server keyserver.ubuntu.com gpg: key 8AA65D56: public key "Seiko Epson Corporation (Epson Inkjet Printer Driver) <email address hidden>" imported gpg: Total number processed: 1 gpg: imported: 1
Workaround, add the key manually: ubuntu. com --recv-keys E5E86C008AA65D56
sudo apt-key adv --keyserver keyserver.
gpg: requesting key 8AA65D56 from hkp server keyserver. ubuntu. com
gpg: key 8AA65D56: public key "Seiko Epson Corporation (Epson Inkjet Printer Driver) <email address hidden>" imported
gpg: Total number processed: 1
gpg: imported: 1