Letsencrypt issue on a Linux

Hello, I’m new to Axigen, please, help me. I´m trying to install Letsencrypt on a Linux server via Axigen CLI using or via WebAdmin, the instructions here Let's Encrypt Support | Axigen Documentation
DNS is working, 80, 443, 53 ports is open.
axigen 1453 axigen 55u IPv4 21327 0t0 TCP *:80 (LISTEN)
axigen 1453 axigen 56u IPv4 21328 0t0 TCP *:443 (LISTEN)
axigen 1453 axigen 57u IPv6 21329 0t0 TCP *:80 (LISTEN)
axigen 1453 axigen 58u IPv6 21330 0t0 TCP *:443 (LISTEN)

When I try generating “LetsEncrypt” certificate I get only account_priv.key on folder /var/opt/axigen/letsencrypt/mail.example.com

I can post only 2 link on post so i split logs so Here is logs:

2021-12-05 21:07:47 +0100 04 linux WEBMAIL:00000000: TCPListener[0.0.0.0:80]: connection from [18.159.196.172:44196] rejected due to service-level rules
2021-12-05 21:07:47 +0100 08 linux WEBADMIN:00000009: LetsE: Found current request
2021-12-05 21:07:47 +0100 04 linux WEBMAIL:00000000: TCPListener[0.0.0.0:80]: connection from [3.142.122.14:30662] rejected due to service-level rules
2021-12-05 21:07:47 +0100 04 linux WEBMAIL:00000000: TCPListener[0.0.0.0:80]: connection from [66.133.109.36:16958] rejected due to service-level rules
2021-12-05 21:07:51 +0100 08 linux WEBADMIN:00000009: previous line is repeated 8 times.
2021-12-05 21:07:52 +0100 02 linux WEBADMIN:00000009: LetsE: Could not open file /var/opt/axigen/letsencrypt/mail.example.com/cert.pem to check its header for letsencrypt
2021-12-05 21:07:52 +0100 02 linux WEBADMIN:00000009: LetsE: Could not open file /var/opt/axigen/letsencrypt/mail.example.com/cert.pem to check its header for letsencrypt