Cannot install unman's `3isec-qubes-cacher`

Hi,

I successfully installed @unman 's 3isec-qubes-task-manager in dom0, unfortunately both qubes-task install 3isec-qubes-cacher, as well as qubes-dom0-update 3isec-qubes-cacher fail. Error message does not help much: Something went wrong trying to install package: 3isec-qubes-cacher for the first command.

Does anyone know how to solve this?

Difficult… Cause helping needs more infos.
What you can do is - complete write/copy in here the steps you’ve done (or just the links to the manual) and maybe someone will figure out, whats wrong in these steps. Just start with the 3isec-qubes-task-manager only, maybe the error here will be the same for cacher also…
If you have luck, @unman will personally step in here with solutions for you.

Best is, showing the commands you did in the way "i did this first… then that… and after this the following messages appear, I don’t understand or whatever…

Commands are already listed