A 525 indicates that your server did not properly respond to Cloudflare’s TLS request. The article you linked really has all the information on this subject and you will need to debug that on your server.
For now it’s best to pause Cloudflare, so you can work directly with your server.
I have tried all that is mentioned and same out come. I have paused Cloudflare and still saying the same thing. I run the hosting on my own Windows Server running Plesk on top of it. I even have other sites that are also on the same server with Cloudflare working beautifully, so I dont understand what is wrong with this one.