I can not install the SSL

The SSL paid site is not working. Help configure

There appears to be an issue with your origin server. It is responding with a 400 error when the connection is made (the output below was direct to origin bypassing Cloudflare).

< HTTP/1.1 400 Bad Request
HTTP/1.1 400 Bad Request
< Server: nginx
Server: nginx
< Date: Wed, 20 Sep 2017 14:31:53 GMT
Date: Wed, 20 Sep 2017 14:31:53 GMT
< Content-Type: text/html; charset=iso-8859-1
Content-Type: text/html; charset=iso-8859-1
< Content-Length: 483
Content-Length: 483
< Connection: keep-alive
Connection: keep-alive

This article may be helpful for configuring your origin server (or if it is hosted by by a company you may wish to contact them):

How can I copy my pre-generated certificate and the SSL key that I purchased from you for $ 5

You can’t. But if you scroll down on the Crypto page you can create and install an origin certificate on your host if you’d like. Cloudflare trusts that certificate and proxied connections can be server over SSL with it.