Maybe that helps. I found it in my error.log
“PHP message: PHP Warning: require_once(/www/public/wp-content/plugins/generateblocks/includes/functions.php): failed to open stream: No such file or directory in /www/public/wp-content/plugins/generateblocks/plugin.php on line 25PHP message: PHP Fatal error: require_once(): Failed opening required ‘/www/public/wp-content/plugins/generateblocks/includes/functions.php’ (include_path=’.:/usr/share/php’) in /www/public/wp-content/plugins/generateblocks/plugin.php on line 25” while reading response header from upstream, client: 77.109.191.237, server: , request: “POST /wp-admin/admin-ajax.php HTTP/1.0”, upstream: “fastcgi://unix:/var/run/php7.4-fpm-techgaragemedia.sock:”, host: “techgarage.media”, referrer: “/wp-admin/post.php?post=262194&action=edit”