Install roundcube-sqlite3 by entering the following commands in the terminal:
sudo apt update sudo apt install roundcube-sqlite3
Description:
metapackage providing SQLite dependencies for RoundCube
This package provides SQLite dependencies for RoundCube Webmail, a skinnable AJAX based webmail solution for IMAP servers. Install this one if you want to use a SQLite database with RoundCube.
Homepage: https://www.roundcube.net/
Version: 1.3.6+dfsg.1-1
Section: universe/web