NamelessMC

I tried add email address for verification in panel/core/email and after trying the test I get error 504 gateway. I have nameless 2.0.0 pre7 (sorry for my english)

2020/05/05 03:13:49 [error] 842#842: *28 upstream timed out (110: Connection timed out) while reading response header from upstream, client: xx.xxx.xx.xxx, server: example.com, request: "GET /panel/core/emails/?action=test&do=send HTTP/1.1", upstream: "fastcgi://unix:/run/php/php7.4-fpm.sock", host: "example.com", referrer: "https://example.com/panel/core/emails/?action=test"