HTTPS error when access link sub.sub.domain.com

Please help, my domain cannot be accessed using https with the error “ERR_SSL_PROTOCOL_ERROR”

I found that I have to subscribe to Advanced Certificate Manager… and I have already purchased it

But the Total TLS button or the add certificate button cannot be clicked. I have been contacting the Cloudflare team for more than 2 weeks via open ticket but have not received an answer until now…

I need this problem solved fast…

What does this section look like to you?

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