Hi, I think I had the same problem. I solved it with the following steps:
1. delete all the keepass config (in ~/.config and ~/.local/share)
2. remove keepass
3. update mono installing the official mono repository (
https://www.mono-project.com/download/stable/ )
4. install PPA jtaylor/keepass
5.
They should remove this package from the universe repository, the bug is
4 years old and the version provided is 2.3. From the official website
http:/www.omegat.org/ you can download version 3.6 and 4.0
If you want to use the google translation api for example, it doesn't
work with the universe ve