I believe it means, that the database user associated with your WordPress installation does not have privileges to create a database table.
I highly recommend granting the table creation permission to the database user, then de-activating and activating the plugin again will create the tables automatically.
Usually this can be granted via cPanel or phpMyAdmin tools as well.
You can create the database tables manually as well, running this SQL code via phpMyAdmin or your preferred database tool.
WARNING: This will only work if your table prefix is set to the default 'wp_' value. Also, make sure to have a full database back-up, before running any SQL queries on your database, in case anything goes wrong!
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