https://wordpress.org/support/topic/getting-php-warning-error?replies=2#post-6104628
Other possible scenarios for a CGI Host Server type:
Note: A DB Backup Reset button will be added to do this automatically in a future version of BPS and BPS Pro.
If you have a CGI Host server type and there is a permissions problem for the /bps-backup/ folder then you would change the /bps-backup/ folder permissions to 755 or 705.
If something generally just went wrong with the automated DB Backup folder creation then you can either manually create the /wp-content/bps-backup/backups_xxxxxxxxxxxxxxx folder and manually add your db backup path settings on the BPS DB Backup page…
…or to allow BPS to automatically create the DB Backups folder again and add the db backup path options settings again – Use phpMyAdmin or another DB editor and delete this BPS database option: bulletproof_security_options_db_backup and delete this folder if it exists: /wp-content/bps-backup/backups_xxxxxxxxxxxxxxx folder.