Your connection is not private browser SSL issue

[edumetrixelearnings]

Getting error: net::ERR_CERT_AUTHORITY_INVALID, after installing origin CA SSL for subdomain on godaddy and origin web server.
“https://support.cloudflare.com/hc/en-us/articles/115000479507” i followed this article to set up origin SSL. Its been a week my issue is not resolved, help me to solve this.

steps:

• Step 1 - Create an Origin CA certificate
• Step 2 - Install an Origin CA certificate at your origin web server
• Step 3 - Configure the SSL/TLS mode in the Cloudflare SSL/TLS app
• Cloudflare origin CA free SSL installation guide on Godaddy - Digital Candy web agency based in Hong Kong

[thedaveCA]

Have you enabled Cloudflare for your site, and set it to proxied mode?

[edumetrixelearnings]

yes enabled Cloudflare DNS set all the DNS records, enabled
for main domain i.e example.com it is showing namecheap ssl, When i look into cpanel SSL/TLS installed ssl for main domain , for subdomain i.e. api.example.com ssl is cloudflar’s origin ssl is installed.

I have a doubt here earlier Cloudflare was not enabled to my domain name cheap SSl was installed, after enabling Cloudflare on top of the domain universal SSL will get enable automatically right?