Bot is not running in unattended mode

My bot is not able to run the sending email module in an unattended mode. Basically, I am doing the test automation which contains the sending email using the outlook. If I look into the logs in orchestrator, bot is doing its job like proceeding to each module and failing at the end, but when I am monitoring the execution of bot in the respective server, it is not proceeding at all after logging into the required application. And after login module, I applied the email module. I am using office 365 for outlook activities.
Please provide the suggestions.
PFA

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