To solve the issue, please install the latest version of WP Cerber: https://wpcerber.com/installation/
WP Cerber is continuously developed and is now more sound and safe than ever before. Read more on the matter:
If anyone were to report a vulnerability, they would earn $1000 , and the WP Cerber team would fix it swiftly. So far, no vulnerabilities have been reported, which shows just how solid our software is.