如果是自己的域名在反代配置加上这2句就可以了。

proxy_ssl_name $host;
proxy_ssl_server_name on;

我自己的配置是

location / {
        proxy_pass https://域名;
        #Proxy Settings
        proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header  X-Real-IP  $remote_addr;
        proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
        proxy_ssl_name $host;
        proxy_ssl_server_name on;
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
        # proxy_max_temp_file_size 0;
        proxy_connect_timeout 90;
        proxy_send_timeout  90;
        proxy_read_timeout 90;
        proxy_buffer_size 64k;
        proxy_buffers  32 32k;
        proxy_busy_buffers_size 128k;
        proxy_temp_file_write_size 64k;
}