Snappymail not opening error

Hello! An error in snappymail after the latest CyberPanel update. Snappymail does not open and returns this error: Warning: pcntl_signal() has been disabled for security reasons in /usr/local/CyberCP/public/snappymail/snappymail/v/2.28.1/app/libraries/MailSo/Log/Logger. php online 78

How to solve?

Thanks!

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