Cyberpanel Cron Jobs not working

I have disabled WordPress cron on my website and enabled server cron using Cyberpanel Cron Jobs.
At first, it was working fine but suddenly it stopped without any changes done on Cyberpanel.

I tried different URL formats but nothing worked!
wget -q -O /dev/null
wget -q -O - - This worked for one day and suddenly it stopped working.

I have already updated Cyberpanel and tried disabling all firewalls but nothing is working.

Can you please help?