Plugin Issue after update to version 7.6

Uncaught Error: Call to undefined function getallheaders() in /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/app/plugins/wp-cerber/cerber-load.php:4933 Stack trace: #0 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/app/plugins/wp-cerber/cerber-load.php(3274): cerber_traffic_log() #1 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/app/plugins/wp-cerber/cerber-load.php(286): cerber_forbidden_page() #2 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/app/plugins/wp-cerber/cerber-load.php(5230): WP_Cerber->InspectRequest() #3 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/app/plugins/wp-cerber/cerber-load.php(746): cerber_beast() #4 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/app/plugins/wp-cerber/wp-cerber.php(97): cerber_init() #5 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/wp-settings.php(305): include_once(‘/srv/bindings/c…’) #6 /srv/bindings/cf3ee7f204014298b1c6de20508954ca/code/wp-config.php(233): require_once(‘/srv/bindings/c…’) #7 /srv/bind