Cannot install Letsencrypt successfully

[rw180800]

I followed the steps in https://ictfax.org/ictfax-installation-guide/# for Centos Stream 8
It seemed to install without error. However I am not able to get the certificate to set properly. Steps below have no errors.
Install SSL Certificate
To add the CentOS 8 EPEL repository, run the following command:

yum install epel-release
yum install certbot python3-certbot-apache mod_ssl
vi /etc/httpd/conf/httpd.conf

add following lines in httpd.conf file

<VirtualHost *:80>
DocumentRoot "/usr/ictfax"
ServerName yourdomain.com

service httpd restart

certbot --apache

SSL checker shows the following errors:
You may need to install an Intermediate/chain certificate to link it to a trusted root certificate

None of the common names in the certificate match the name that was entered (..com.au)

The previous install I did had more in the install steps:
echo '' > /etc/freeswitch/tls/wss.pem && cat cert.pem >> /etc/freeswitch/tls/wss.pem && cat privkey.pem >> /etc/freeswitch/tls/wss.pem && cat chain.pem >> /etc/freeswitch/tls/wss.pem

but this version does not have a TLS folder....

[danishhafeez15]

Hi @rw180800,

Have you entered your domain in the following step: ServerName yourdomain.com? If not, that's likely causing the error. Otherwise, we recently installed SSL on our server successfully, and it's working. There may be an issue with your domain if you have added it as mentioned above.

[rw180800]

thanks for the reply, I entered the FQDN the same way I did it for the previous version. Is there a way to clear the cert and start again?