White screen upon activation Yoast

Downloaded Yoast to site under construction and after activation, all goes white.

Need to rename plugin folder etc to reset all.

Tested all plug-ins de-activated and other themes and in several browsers and it seems at this stage to be Yoast-plugin-only issue.

WP Query showws fatal error: Uncaught Exception: Table ‘dbvodfhvom6mz7.yoast_wp_seo_models_indexable’ doesn’t exist
in /home/customer/www/vyntner.com/public_html/wp-includes/wp-db.php on line 2056

There seems to be issue with this line in WP-DB.php : $this->result = mysqli_query( $this->dbh, $query );

Where should I look for solution?

Thanks in advance!

Nicolaas Pereboom

The page I need help with: [log in to see the link]