Is this a transient or persistent issue?
Transient meaning, if you re-run the installer, does the issue happen again and again?
Network issue? Suppose you’re using (a) Debian (based) host operating system, can you run command
sudo apt update ; echo $?
(or whatever command your host operating system uses equivalent just the usual thing)
without issues?
At the end shows
0
which means exit code is 0, meaning no issues during running the apt update command.