After migration using the migration script certbot do not seem to work.

Not able to get letsencrypt to issue a new cert.
Checked the logs at /var/log/letsencrypt but could not find anything that points to the issue.
The system is debian 12 and using certbot because it was a migration from centos 7 to debian 12.
I would have like to use acme simply because it is just bash. I am guessing.
Anyway, need to solve this, what other logs can I check? Tried /var/log/ispconfig too.
Maybe I just missed something.
Also, when in the centos 7, when there is an error when asking for a new cert, I would get an email saying it was not successful.
Now I am not getting it. Where should I look into these issues?
Need advice on where to look for clues to the problem.

 

Thank you for the link. Very useful for trouble shooting.
As for my case, I entered the admin name and email address and the admin notification by smtp.
Then tried to get the ssl cert. It worked!
I am guessing maybe the dns propagation took time.