there has been a critical error on this website

Hi,

I am getting there has been a critical error on this website, only when I attempt to open it through mobile device, on desktop it opens without a problem…

I must note that I am monitoring the server with Checkmk, I have created a SwapFile of 6Gb, also increased memory limit in php.ini and wp-config, also deleted and reinstalled all the plugins, health check is without any critical issues and there are no error in apache2 and mysql logs…

This is from wp-debug-log:

[24-Jul-2022 10:43:12 UTC] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/wp-includes/functions.php on line 651
[24-Jul-2022 10:43:38 UTC] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/wp-includes/functions.php on line 651
[24-Jul-2022 10:52:54 UTC] PHP Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 262144 bytes) in /var/www/html/wp-includes/plugin.php on line 191
[24-Jul-2022 10:53:00 UTC] PHP Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0

The page I need help with: [log in to see the link]