Troubleshooting Email Sequencing Issues in Clay

Hi I'm new to Clay. I'm trying the email sequencing function on Clay. For the contact information I had 3 columns: First name, Last name and email (With the email data type). The subject and body just contained text "Test" My email was from Google OAuth and I have set up the app in Google Workspace as requested. I tried sending a test email and it just gave me this error. When I launched my campaign it wasn't able to send out the emails either. Any help is appreciated!