Until last week I could successfully send mails using calls to the MC Rest API, using a Trigger Send.
But now without changing anything, when I make a call to send an email using the follow call:
The response is the same as always:
and on the trigger send on the UI of MC, the email is queued but after some seconds the email was not send and the completed column don't show it.
I wonder if there is some issue on the MC servers or is under maintenance.