Can you please switch to the main server?
Launch Software & Updates, then for the drop down menu next to Download From select "Main Server."
What is the output of
sudo apt-mark showhold
Can you run:
sudo dpkg --add-architecture i386
Can you please switch to the main server?
Launch Software & Updates, then for the drop down menu next to Download From select "Main Server."
What is the output of
sudo apt-mark showhold
Can you run:
sudo dpkg --add-architecture i386