Nginx disconnecting two subdomains

Hello, I'm having problems with two subdomains, I checked the tail I found this error: 2018/06/15 13:02:11 [error] 13456 # 13456: * 807 connect () to unix: /var/run/php7.1-fpm-esf.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: ip-x, server: _, request: "GET / HTTP / 1.0", upstream: "fastcgi: // unix: /var/run/php7.1-fpm-esf.sock:"