WordPress Backup to Dropbox failed to initialize due to these database errors

[stevinoz]

have not seen this before any ideas?
Can't create table 'wp_wpb2d_options' (errno: 28)
Can't create table 'wp_wpb2d_processed_files' (errno: 28)
Can't create table 'wp_wpb2d_excluded_files' (errno: 28)