Failed to obtain SSL for: "example.com":

I made the hostname ssl for “example.com” that was ok but accidently when i tried to issue ssl for another domain i made again hostname ssl insted of issus ssl.
Now when i trie to issue ssl for the first domain “example.com” it shows me at logs file Failed to obtain SSL.

share logs please

Thank for you time hassan i solve it it was dns ,ns problem.

Please share the solution