I have created a journey that is triggered by a salesforce data event, updates the object and sends an email afterwards. For most contacts the journey works fine but some contacts get injected into the journey, the object is updated via the "Choose Object"-Activity, but sending the mails fails. I already changed the email to one not using any AMPscript or other personalization so I can eliminate this reason for the failing send.
Checking the Contacts for the journey shows that the status of the email send is "Failed", but doesn't show any details. However the corresponding triggered send in email studio shows no failed sends. I also checked the chrome developer tools for any errors visible there, but didn't find any additional information.
Is there any way to get more information without creating a case for SFMC support? Or are there some common causes for such errors?