How to install an SSL certificate from Cloudflare on the server?

Question

linux

I can't figure out what I'm doing wrong.
I read all conceivable instructions for installing a certificate, but I still get ERR_CERT_AUTHORITY_INVALID.

The domain is connected


Encryption is enabled


The public and private keys are generated and installed on the server correctly along with the cloudflare certificate




But nevertheless, the output is always

Answer 1

Put Flexible and don't worry

Answer 2

Full strict requires a trusted certificate on your server.

Answer 3

Ip did not change to cloudflare