E:The repository 'http://apt.postgresql.org/pub/repos/apt tessa-pgdg Release' does not have a Release file

Question

I have installed android studio on my linux mint 19.1 and after installation of it I restarted my PC. After restarting I couldn't see wi-fi sign in my machine.

Enable wifi option is not showing. I opened driver manager and I got the above error. I have already tried sudo apt-get update and sudo apt-get upgrade. I also restarted my machine several times.

Answer 1

I think this error appeared since the PostgreSQL repo doesn't have a release for "tessa".

Two solutions:

1. Edit the "/etc/apt/sources.list.d/pgdg.list" file (or another list file contains "http://apt.postgresql.org/pub/repos/apt tessa-pgdg Release") and change "tessa" to one of the version name supported by PostgreSQL (here is the list: https://apt.postgresql.org/pub/repos/apt/dists/).
2. Simply delete "/etc/apt/sources.list.d/pgdg.list" or remove the line "http://apt.postgresql.org/pub/repos/apt tessa-pgdg Release" in other file if you are not using PostgreSQL.