I did not find any “20-connectivity.conf” under /etc/NetworkManager/conf.d/, it was empty.
However, I found one under /usr/lib/NetworkManager/conf.d/20-connectivity.conf, and it referred to uri = http://www.archlinux.org/check_network_status.txt.
Can you change that file instead, because there are other files that belong to NetworkManager here under /etc/NetworkManager/?
Found this information.
https://manpages.ubuntu.com/manpages/bionic/man5/NetworkManager.conf.5.html
“If a default NetworkManager.conf is provided by your distribution’s packages, you should
not modify it, since your changes may get overwritten by package updates. Instead, you can
add additional .conf files to the /etc/NetworkManager/conf.d directory. These will be read
in order, with later files overriding earlier ones. Packages might install further
configuration snippets to /usr/lib/NetworkManager/conf.d. This directory is parsed first,
even before NetworkManager.conf.”
I’m new to Linux and Manjaro, coming from Windows 7.
And sorry for stupid questions, I also suffer from a severe fatigue syndrome, and can no longer read manuals and long instructions.