Invoice is nor emailed

I have installed on premise. Invoice are not emailed. Where do you see the error, so i can figure out what the problem is?

Any suggestions?

I am using sendmail. The invoice last sent mail date is updated, but the invoice is not emailed. What is the location of the email file.

No suggestion from anyone?

Does the error below has anything to do with it,

[2023-08-25 13:41:58] production.DEBUG: Console command:: '/usr/local/bin/php' 'artisan' help