SSL problems using Cloudflare Strict mode

Hi guys I have added my domain to Cloudflare and I took the strict mode cert and key and I add them to my website configuration/Add SSL (pasted cert and key)
and now it’s showing ‘‘error host’’ SSL certificate and if I change the strict mode to flexible the website works normally how can I fix this?

can you show me the website manage dashboard of your website in cyberpanel as for strict more SSL your site must have a valid SSL of lets encrypt also

The problem is the let’s encrypt option in cyber panel does not work no matter what i do, i always receive ‘’ faild to issue ssl’’ despite trying to update cyber panel or the ssh !

Show me your vhost configrations