Resource temporarily unavailable

2024/09/14 09:44:50 [error] 27608#27608: *751840 connect() to unix:/var/run/php/php7.2-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 172.71.103.86, server: example.com, request: "GET /index.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.2-fpm.sock:", host: "example.com"

systemctl restart php7.2-fpm