Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
What is telling your site is not secure? And, what exactly is the message? Can you upload screen shot or something?
I see your domain using a cert issued today. The same as whynopadlock shows and also SSL Labs Server test (here)
Your domain is using Cloudflare's CDN service so it is unlikely to get a failed cert with that since it manages the certs between its edge and clients (like browsers)
You're using CloudFlare CDN.
So, the Internet only sees the CDN [which is secured with a valid wildcard certificate].
If you are connecting to your server directly and that shows "not secure", then you need to show us the certificate it uses [and you may need to update that certificate (like missing "www") OR restart the web service, if that certificate has already been renewed]