Fatal Errors after new update

Anytime I try to do any work on the Admin page (changing user profiles, updating plugins, etc) Advanced Post Block kicks the following error.

2023/12/04 13:00:32 [error] 31311#31311: *5992917 FastCGI sent in stderr: “PHP message: PHP Warning: Cannot modify header information – headers already sent by (output started at /home/server/site.com/wp-content/plugins/advanced-post-block/inc/custom-post.php:85) in /home/server/site.com/wp-admin/includes/misc.php on line 1431PHP message: PHP Warning: Cannot modify header information – headers already sent by (output started at /home/server/site.com/wp-content/plugins/advanced-post-block/inc/custom-post.php:85) in /home/server/site.com/wp-includes/functions.php on line 7049” while reading upstream, client: IP, server: site.com, request: “[literally any backend request]”, upstream: “fastcgi://unix:/var/run/nginx-#######:”, host: “www.site.com”, referrer: “https://www.thebritishhistorypodcast.com/wp-admin/plugins.php”

Thanks!