Queued emails are blocked

Emails are blocked, getting the following error on cron (mautic:emails:send -vvv -env=dev)

[Swift_TransportException]
Cannot send message without a sender address

mautic:emails:send [–message-limit [MESSAGE-LIMIT]] [–time-limit [TIME-LIMIT]] [–do-not-clear] [–recover-timeout [RECOVER-TIMEOUT]] [–clear-timeout [CLEAR-TIMEOUT]] [-f|–force] [–bypass-locking] [-t|–timeout TIMEOUT] [-x|–lock_mode LOCK_MODE] [-h|–help] [-q|–quiet] [-v|vv|vvv|–verbose] [-V|–version] [–ansi] [–no-ansi] [-n|–no-interaction] [-s|–shell] [–process-isolation] [-e|–env ENV] [–no-debug] [–] <command>

Can someone please help?

Email handling set as Queue.

Using v2.14.0