I originally posted this in the Arch Linux forums, because it appears the root of the problem is on their Apache Zeppelin page. A rather rude forum monitor summarily closed the post telling me to post my message here, because I run Manjaro Linux on my system.
I tried to install Apache Zeppelin through the “Add/Remove Software” GUI interface. The installation failed when the download failed with a 404 error. The installer was attempting to download the package using this URL (sorry, the Arch Linux forum replaced some of the address with an ellipsis):
I tried navigating to the host, and it appears to be a classified ad site. I thought something must have hijacked my system, but inspecting the build files showed the same URL in there. I then pointed my browser to this URL provided with the package information in the installer GUI:
To my surprise, that page points to essentially the same errant URL for the package download (again, the Arch Linux forum replaced some of the address with an ellipsis):
AUR is unsupported whether you are using Manjaro or Arch.
The installer source does not exist anymore - that is - jugding from the result of the download url.
It is a well known issue with expired domain names - some picks it up and leeches on the domains previous history.
The package was flagged out-of-date (2022-02-07), I am guessing the invalid source link.
If it is indeed a valid application you will have to figure out where you can obtain the source - from there you can build the package manually - but the forum does not deal with those un-maintained packages - you will have to figure that out on your own.
