Warning: Declaration of W3TC\DbCache_Wpdb::prepare($query, $args) should be compatible with wpdb::prepare($query, ...$args) in /home/bmlift/public_html/wp-content/plugins/w3-total-cache/DbCache_Wpdb.php on line 177 WordPress › Error
Access denied for user 'bmlift_user'@'localhost' to database 'bmlift_main'
Cannot select database
The database server could be connected to (which means your username and password is okay) but the bmlift_main database could not be selected.
Are you sure it exists?
Does the user bmlift_user have permission to use the bmlift_main database?
On some systems the name of your database is prefixed with your username, so it would be like username_bmlift_main. Could that be the problem?
If you do not know how to set up a database you should contact your host. If all else fails you may find help at the WordPress Support Forums.