@rochajorge phplist isn’t finding your tables. Possibly you also need to set these values if they were different
# if you want a prefix to all your tables, specify it here,
$table_prefix = 'phplist_';
# if you want to use a different prefix to user tables, specify it here.
# read README.usertables for more information
$usertable_prefix = 'phplist_user_';