CWP7 AutoSSL (letsencrypt) for hostname failed.

Hello,
I've decided to install CWP7 today on an OpenVZ I'm renting.
The OpenVZ IP is static 185.53.129.160 and it is set in the vps control panel to srv.madbeka.win

First thing I did after installing is settings the nameservers as followed:
on ns1.madbeka.win.db
ns1.madbeka.win.   NS   86400   ns1.madbeka.win.   
ns1.madbeka.win.   NS   86400   ns2.madbeka.win.   
ns1.madbeka.win.   A   14400   185.53.129.160

on ns2.madbeka.win.db
ns2.madbeka.win.   NS   86400   ns1.madbeka.win.   
ns2.madbeka.win.   NS   86400   ns2.madbeka.win.   
ns2.madbeka.win.   A   14400   185.53.129.160

After that I set up a new DNS Zone - srv.madbeka.win.db and set it as followed:
srv.madbeka.win.   NS   86400   ns1.madbeka.win.   
srv.madbeka.win.   NS   86400   ns2.madbeka.win.   
srv.madbeka.win.   MX   0   srv.madbeka.win.
srv.madbeka.win.   A      185.53.129.160   
localhost.srv.madbeka.win.   A      127.0.0.1
_dmarc   TXT   14400   v=DMARC1; p=reject; pct=100; adkim=r; aspf=s   
@   TXT   14400   v=spf1 a mx ~all

Then I went to "Change Hostname" tab and verified that:
Your Hostname is: srv.madbeka.win and it resolves to IP: 185.53.129.160 [Check Black List] [Check CWP SSL] [Check WebServers SSL] rDNS/PTR = srv.madbeka.win SUCCESS [Check SenderBase]   

Under New Hostname i have srv.madbeka.win

The thing is that after I click on "Change Hostname" it doesn't generate an AUTOSSL certificate.
tail -f /root/.acme.sh/acme.sh.log showed me this error:

[Fri May  7 18:36:00 CEST 2021] POST
[Fri May  7 18:36:00 CEST 2021] _post_url='https://acme-v02.api.letsencrypt.org/acme/finalize/122704566/9545281925'
[Fri May  7 18:36:00 CEST 2021] _CURL='curl --silent --dump-header /root/.acme.sh/http.header  -L  -g '
[Fri May  7 18:36:01 CEST 2021] _ret='0'
[Fri May  7 18:36:01 CEST 2021] code='403'
[Fri May  7 18:36:01 CEST 2021] Sign failed, finalize code is not 200.
[Fri May  7 18:36:01 CEST 2021] {
  "type": "urn:ietf:params:acme:error:orderNotReady",
  "detail": "Order's status (\"invalid\") is not acceptable for finalization",
  "status": 403
}
[Fri May  7 18:36:01 CEST 2021] _on_issue_err
[Fri May  7 18:36:01 CEST 2021] Please check log file for more details: /root/.acme.sh/acme.sh.log

Any ideas what is wrong with it?