/tmp file get full every 2,3 days and website stops working

I have hosted my website on a dedicated server using Ubuntu 20.04. I have installed Cyber Panel to manage my website. But after 2,3 days my website stopped working and when I check ‘’‘dh -h’’’ it shows /tmp is 100% occupied.

Is there a way, I can get rid of this shit and can set auto clean using ssh or Cyber Panel Cron job? Thanks
df -h

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