Error opening db: No backend database support for type: sqlite
Guess what that means? You don’t have sqlite installed probably 😉
If you have sqlite3 installed, you need to adjust the config file to use sqlite3, otherwise just install the version you like more (2 or 3)…
PS: Not sure if Kubuntu uses the same packet manager as Unbuntu with a K… just search for a package named “sqlite” or “sqlite3” there.