Cannot access website by domain sometimes for few hours

Hello!

I created a droplet with Plesk an installed WordPress.

My site is “http://dev.hkbabymap.com”

I changed Domain DNS to Digital Ocean and created some new A records:

“dev.hkbabymap.com” to “178.128.82.233”

We can access to the site with the domain most of the time. Yet, whenever we edit the Wordpress site like adding new entry of record, the 404 error happens randomly sometimes. Then, we cannot access the site again for around 1 to 2 hours.

Has anyone ever had anything like this? Thanks.

Here is the error log with “~# tail -100 /var/log/nginx/error.log”

2019/03/26 09:39:13 [emerg] 1019#0: bind() to 104.248.254.214:80 failed (99: Cannot assign requested address)
2019/03/26 09:42:18 [notice] 15484#0: using inherited sockets from "6;7;8;9;"
2019/04/01 01:47:20 [crit] 17966#0: *10762 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/04/05 17:43:41 [crit] 17966#0: *16212 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/04/13 03:13:40 [crit] 17966#0: *31608 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/04/17 14:08:10 [crit] 17966#0: *41201 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/04/19 12:42:14 [crit] 17966#0: *41953 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/04/26 19:45:44 [crit] 17966#0: *47689 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/05/05 17:58:20 [crit] 1079#0: *708 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/05/06 09:52:29 [crit] 1079#0: *790 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/05/11 02:20:35 [crit] 1079#0: *5163 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/05/17 12:17:11 [crit] 1079#0: *12539 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/06/03 21:43:00 [crit] 1037#0: *3862 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/06/08 19:41:16 [crit] 1037#0: *5353 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/06/16 06:19:19 [crit] 1037#0: *24086 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443
2019/06/21 19:23:14 [crit] 1037#0: *26599 SSL_do_handshake() failed (SSL: error:1417D0A0:SSL routines:tls_process_client_hello:length too short) while SSL handshaking, client: <snip>, server: 178.128.82.233:443

Moderator edit: Client (user) IP redacted.