This sort of issue can happen when one of two situations happen:
Snap is doing something in the background
The Internet connection is inconsistent
You can check the first item by opening a terminal and running snap changes, which may give you a list that looks like this:
555 Doing 2021-06-19T09:12:11Z - Install "cookies" snap
556 Doing ...
In short, Epic Games launcher can be downloaded through Lutris.
Please see here for that (Make sure to download Wine first).
After installing it, search up Fortnite. Installing Fortnite really just installs the Epic Games Launcher. After that, you gain access to both Lutris and Epic Games Launcher, but be careful. Most games on their don't support Linux and ...
Looking at the package changelog (apt-get changelog util-linux) you will see that pg has been deprecated and removed:
util-linux (2.29.2-2) unstable; urgency=medium
"The big post-release cleanup."
[ Andreas Henriksson ]
* Add DEP12 upstream metadata (Closes: #852731)
* Revert "Add configure flag to make libmount skip /etc/mtab"