I see the next error in the NGINX logs. I understand you need to add something to the NGINX configuration for allowing access to the mentioned folder, but you should better check it with the plugin developers.
2020/07/09 09:39:02 [error] 5328#0: *11312 directory index of "/opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/elementskit/modules/parallax/" is forbidden, client: 126.96.36.199, server: localhost, request: "GET /wp-content/plugins/elementskit/modules/parallax/ HTTP/1.1", host: "188.8.131.52"
In case you need to add something to the NGINX configuration for Wordpress, please add it to the
/opt/bitnami/apps/wordpress/conf/nginx-app.conf file, and then restart the NGINX service with
sudo /opt/bitnami/ctlscript.sh restart nginx