Updated to latest WordPress. Site now unaccessable

While working on createnetlv.com yesterday I saw a reminder to update WordPress. I did so and work up this morning to a white screen with this.
Warning: include_once(/home3/rgl1951/public_html/createnetlv.com/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No such file or directory in /home3/rgl1951/public_html/createnetlv.com/wp-content/advanced-cache.php on line 21

Warning: include_once(): Failed opening ‘/home3/rgl1951/public_html/createnetlv.com/wp-content/plugins/wp-super-cache/wp-cache-phase1.php’ for inclusion (include_path=’.:/opt/php71/lib/php’) in /home3/rgl1951/public_html/createnetlv.com/wp-content/advanced-cache.php on line 21

Warning: Cannot modify header information – headers already sent by (output started at /home3/rgl1951/public_html/createnetlv.com/wp-content/advanced-cache.php:21) in /home3/rgl1951/public_html/createnetlv.com/wp-includes/pluggable.php on line 1265

Warning: Cannot modify header information – headers already sent by (output started at /home3/rgl1951/public_html/createnetlv.com/wp-content/advanced-cache.php:21) in /home3/rgl1951/public_html/createnetlv.com/wp-includes/pluggable.php on line 1268

I am not able to access the dashboard. HELP!!!

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