Looks like after the upgrade of Apache, it uses default port 80.
But it is not valid configuration for enabled nginx proxy.
Try:
/usr/local/psa/admin/bin/nginxmng --disable
/usr/local/psa/admin/bin/nginxmng --enable
Check Apache has config /etc/apache2/conf.d/zz010_psa_httpd.conf
There should...