Troubleshooting Email Authentication Issues for Sales Outreach Agent

Hi, I'm currently building a sales outreach agent to automate both emails and LinkedIn messages in Parallel. The trigger is changes in a google sheet I'm using the track leads (ie, a row added, triggers the agent to run the flow for that lead). I have tested with one new lead and the first email sends automatically from my account in test mode. However, when I "Deploy" the agent, it says that it cannot send the email because of authentication issues and a fundamental system error. Any help would be appreciated! Thanks. See screenshot below.