How is your "Send Email" setup? From your screenshot, Send Email step is being executed but since no email is being sent out, the chance is that the settings are not correct.
Also, check if the user running the flow has ACL priviledge to send out email.
ACL restrictions apply to the Send Email action. If you configured your flow to run as the user who initiates the session, ensure that the user has access control to send email. To test access controls for a Send Email action, impersonate a typical email sender and manually trigger the flow.
https://docs.servicenow.com/bundle/orlando-servicenow-platform/page/administer/flow-designer/referen...
