Having trouble installing Paratext 7.5 on Ubuntu 16.04

Question

We’ve followed the instructions setup the repository and when we click on the the install button for Paratext 7.5 we get an error message saying that it cannot find the file ending in *5_1.80_amd64.deb

When we go to the repository itself, we see that the 1.80 file is not listed.
We’ve tried to download and install several of the other .deb files but they have all failed.
When we double click on the deb file, we sometimes get an error, and we sometimes get nothing.

Anything else we should try?

Answer 1

The error we sometimes get when we attempt to install the .deb file
Detailed error from the package manager follow:
apt transaction returned result exit-failed

Comments

We were able to install the .deb file using terminal command lines