I would like to see a list of all the table in the Database. wp_GjKDAWaOqu_ could just be the prefix that is being used for your database tables.
Usually when you see this kind of issue, it is because the WordPress directory is owned by an user other than the user which the web server is running as.
You would just need to run the chwon command in the format below.
chown -R ownername:groupname path/to/wordpress/
Example
chown -R www-data:www-data /var/www/html/wordpress
