DT not sending email anymore

kainos

My DT instance was sending emails and just stopped. No configuration was changed. But suddenly DT is no longer emailing. Here is the error log

2025-05-08 12:55:10am Garland Wong wp_mail_failed Could not instantiate mail function. From: http://saddleback-mexico-cdmx.mensforge.net/wp-login.php?action=lostpassword
2025-05-08 12:55:10am Garland Wong retrieve_password_email_failure <strong>Error:</strong> The email could not be sent. Your site may not be correctly configured to send emails. <a href="https://wordpress.org/documentation/article/reset-your-password/">Get support for resetting your password</a>. From: http://saddle...
2025-05-08 12:55:10am Garland Wong confirm message Check your email for the confirmation link, then visit the <a href="https://saddleback-mexico-cdmx.mensforge.net/wp-login.php">login page</a>. From: http://saddleback-mexico-cdmx.mensforge.net/wp-login.php?checkemail=confirm

How do I troubleshoot this?

Corsac