Never mind my previous question #22. I just had to enable the use of bionic-proposal, then the procedures worked. However, they generated a number of worrisome error messages. In any case, I am now able to use apt on my system again. :-)
Never mind my previous question #22. I just had to enable the use of bionic-proposal, then the procedures worked. However, they generated a number of worrisome error messages. In any case, I am now able to use apt on my system again. :-)