I am not able to add or update any repositories on my PC.
The following error encountered when I tried updating using
sudo apt-get update
E: The repository 'http://ppa.launchpad.net/screenlets/ppa/ubuntu bionic Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
This error mentions screenlets repository but I am getting the same error when I try to add any repository.I was getting the same error before adding screenlets repository.
The following are my specs fetched using neofetch:
OS: Ubuntu 18.04.4 LTS x86_64 Kernel: 4.15.0-109-generic
Shell: bash 4.4.20
CPU: Intel Core 2 Duo E7200 (2) @ 2.306GHz
GPU: Intel 4 Series Chipset
Memory: 1655MiB / 7848MiB
It is actually lubuntu 18.04
the question here is that not only I want to add repositories but also update the existing ones. Also, installing applications from snap is also not working but that could be a different thing altogether.