VPS Nginx/ Apache | multi website doesn't work - apache

Question

I've moved 2 domains on the VPS and they work fine, just one at a time.
If I disable one, then the other one works - not both.
dom1.com , dom2.com
have the same DNS records, except the A records with their domain-name pointing to the same IP on the VPS, their DNS records are both on CloudFlare, and they're both configured the same way on the VPS (with aaPanel).
The only difference is their site directory.
Do you know what could trigger this issue?
CentOS 8
aaPanel 6.8.21
Apache 2.4 (same issue on Nginx 1.19)
DNS manager: CloudFlare
Many Thanks
dom1.com | config
DocumentRoot "/www/wwwroot/dom1.com"
ServerName 745e5c8e.dom1.com
ServerAlias dom1.com mail.dom1.com
#errorDocument 404 /404.html
ErrorLog "/www/wwwlogs/dom1.com-error_log"
CustomLog "/www/wwwlogs/dom1.com-access_log" combined
#HTTP_TO_HTTPS_START
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteRule (.*) https://%{SERVER_NAME}$1 [L,R=301]
</IfModule>
#HTTP_TO_HTTPS_END
#referenced redirect rule, if commented, the configured redirect rule will be invalid
IncludeOptional /www/server/panel/vhost/apache/redirect/dom1.com/*.conf
#DENY FILES
<Files ~ (\.user.ini|\.htaccess|\.git|\.svn|\.project|LICENSE|README.md)$>
Order allow,deny
Deny from all
</Files>
#PHP
<FilesMatch \.php$>
SetHandler "proxy:unix:/tmp/php-cgi-73.sock|fcgi://localhost"
</FilesMatch>
#PATH
<Directory "/www/wwwroot/dom1.com">
SetOutputFilter DEFLATE
Options FollowSymLinks
AllowOverride All
Require all granted
DirectoryIndex index.php index.html index.htm default.php default.html default.htm
</Directory>
</VirtualHost>
<VirtualHost *:443>
ServerAdmin webmaster#example.com
DocumentRoot "/www/wwwroot/dom1.com/"
ServerName SSL.dom1.com
ServerAlias dom1.com mail.dom1.com
#errorDocument 404 /404.html
ErrorLog "/www/wwwlogs/dom1.com-error_log"
CustomLog "/www/wwwlogs/dom1.com-access_log" combined
#SSL
SSLEngine On
SSLCertificateFile /www/server/panel/vhost/cert/dom1.com/fullchain.pem
SSLCertificateKeyFile /www/server/panel/vhost/cert/dom1.com/privkey.pem
SSLCipherSuite EECDH+CHACHA20:EECDH+CHACHA20-draft:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5
SSLProtocol All -SSLv2 -SSLv3 -TLSv1
SSLHonorCipherOrder On
#PHP
<FilesMatch \.php$>
SetHandler "proxy:unix:/tmp/php-cgi-73.sock|fcgi://localhost"
</FilesMatch>
#DENY FILES
<Files ~ (\.user.ini|\.htaccess|\.git|\.svn|\.project|LICENSE|README.md)$>
Order allow,deny
Deny from all
</Files>
#PATH
<Directory "/www/wwwroot/dom1.com/">
SetOutputFilter DEFLATE
Options FollowSymLinks
AllowOverride All
Require all granted
DirectoryIndex index.php index.html index.htm default.php default.html default.htm
</Directory>
</VirtualHost>
dom2.com | config
ServerAdmin webmaster#example.com
DocumentRoot "/www/wwwroot/dom2.com"
ServerName 218ac146.dom2.com
ServerAlias dom2.com mail.dom2.com
#errorDocument 404 /404.html
ErrorLog "/www/wwwlogs/dom2.com-error_log"
CustomLog "/www/wwwlogs/dom2.com-access_log" combined
#DENY FILES
<Files ~ (\.user.ini|\.htaccess|\.git|\.svn|\.project|LICENSE|README.md)$>
Order allow,deny
Deny from all
</Files>
#PHP
<FilesMatch \.php$>
SetHandler "proxy:unix:/tmp/php-cgi-73.sock|fcgi://localhost"
</FilesMatch>
#PATH
<Directory "/www/wwwroot/dom2.com">
SetOutputFilter DEFLATE
Options FollowSymLinks
AllowOverride All
Require all granted
DirectoryIndex index.php index.html index.htm default.php default.html default.htm
</Directory>
</VirtualHost>

Answer 1

I found the problem.
aaPanel added a wrong sub-domain in their config file.
So fixing that resolved the issue.