So you got me curious. I went and downloaded pop!_os from their website and installed it in Parallels. Installed the additions so I didn’t have to squint while using it, took a snapshot of the VM and then proceeded to download Feedback from our site in the order I expected them to work…
- The Debian Package failed as you mentioned above because of dependencies that have changed since the Feedback 2018r1.1 build was done.
- RPM Package - Extracted it to a folder, drilled down to the Feedback executable and double-clicked it. It just worked.
- TGZ Package - Extracted it to a folder, drilled down to the Feedback executable and double-clicked it. It just worked.
I did not have to install any additional libraries to get it to work.
My suggestion is that you download the most recent version of Feedback from our website (which is 2018r1.1) and try again.