Error exporting table

Hi,

I get the same error as in a previous thread while trying to export a table:

Warning: mysql_query(): Access denied for user ”@’localhost’ (using password: NO) in /wp-content/plugins/wp-csv-to-database/main.php on line 111
Warning: mysql_query(): A link to the server could not be established in /wp-content/plugins/wp-csv-to-database/main.php on line 111
Warning: mysql_num_fields() expects parameter 1 to be resource, boolean given in /wp-content/plugins/wp-csv-to-database/main.php on line 113
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-csv-to-database/main.php:111) in /wp-content/plugins/wp-csv-to-database/main.php on line 138
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-csv-to-database/main.php:111) in /wp-content/plugins/wp-csv-to-database/main.php on line 139
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-csv-to-database/main.php:111) in /wp-content/plugins/wp-csv-to-database/main.php on line 140
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-csv-to-database/main.php:111) in /wp-content/plugins/wp-csv-to-database/main.php on line 141
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-csv-to-database/main.php:111) in /wp-content/plugins/wp-csv-to-database/main.php on line 142
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-csv-to-database/main.php:111) in /wp-content/plugins/wp-csv-to-database/main.php on line 143

This is on WP 4.8.2.

Cheers,
Christian