'Angular Universal / 502 Proxy Error - DNS lookup failure

I'm having a problem while I'm trying to deploy an Angular Universal to a production Linux Server.

The problem that I'm facing is that the servers returns a 502 Proxy Error ( can find it on: http://huntsmanstudio.gr/ ).

The configuration file is:

huntsmanstudio.gr.conf----------------

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName huntsmanstudio.gr
    ServerAlias www.huntsmanstudio.gr
    ProxyPreserveHost On
    ProxyRequests Off
    ProxyPass / http://server.ip.addr:2000/
    ProxyPassReverse / http://server.ip.addr:2000/
</VirtualHost>

On server.ts I have set the port to 2000

Thank you in advance.

I've reinstalled all things from scratch but nothing worked.

Bellow is my error.log:

[Fri Mar 25 19:24:01.768535 2022] [proxy:error] [pid 2979] [client 62.74.2.44:44733] AH00898: DNS lookup failure for: server.ip.addr returned by /
[Fri Mar 25 19:24:01.918258 2022] [proxy:error] [pid 2979] [client 62.74.2.44:44733] AH00898: DNS lookup failure for: server.ip.addr returned by /favicon.ico, referer: http://huntsmanstudio.gr/

proxy apache2

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'Angular Universal / 502 Proxy Error - DNS lookup failure

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