Hi @DenisCuencaBrex! Welcome to our community!
It looks like the issue was due to your site not having an SSL certificate. Generally, the reason we are unable to provision a complete SSL certificate for your custom domain is that the DNS cache time to live (TTL) value for a record has not had time to expire (from your old settings) before you tried to use it with Netlify. Our SSL provider (https://letsencrypt.org) is unable to create certificates for names that have old cached values still in effect. This can sometimes take 24 hours or even longer.
The additional delay seems to have been enough to allow things to work right when our system attempted to re-issue the certificate.
Please let us know if things are not working as expected now!