If you get something like below:

Ign https://techtimejourney.net audax/main Translation-en
W: Failed to fetch https://techtimejourney.net/audax-initial/dists/audax/main/i18n/Translation-en_GB Error reading from server. Remote end closed connectionE: Some index files failed to download. They have been ignored, or old ones used instead.

It means repository failed to sync completely like the system expected. This is an issue, which might be related to the configurations coming from my service provider or then it might just be an issue relating to Debian base. In any case, the issue is not fatal and sudo apt-get upgrade and sudo apt-get install commands should still work with PostX repositories. What actually happens is that only some non-essential translation files fail to load correctly. You could also wait some time and try apt-get update again – since the fetching of translation files does not always fail. Regardless of the solution, both ways of doing things should work just fine.