Hi
Follow the default install instructions…
Before you click initial database do
vim config/db.inc.php
change from:
$rcmail_config['db_dsnw'] = 'sqlite://roundcubemail?mode=0646';
to:
$rcmail_config['db_dsnw'] = 'sqlite:///roundcubemail?mode=0646';
after this do:
sqlite -init SQL/sqlite.initial.sql sqlite.db .exit
Now you can initialize your database
Have Fun