SSL Active but site not secure

Hello, on cloudflare says my SSL active but on my site ( https://grootindonesia.com/ ) showing not secure and invalid certificate. I tried with Flexible, Full, Strict and also try to disabled and re-enabled again but still doesnt work.

Many thanks for anyone that can help!

我觉得我的情况和你的情况一样,我的网站https也显示不安全,ssl无效。
它不稳定,它也会被谷歌浏览器阻止。