Err_ssl_protocol_error - 3/23/2022

I just added a custom domain to my site but I’m currently getting an RR_SSL_PROTOCOL_ERROR. Is there a delay in the SSL certificate when switching from the .io site and launching the custom domain? I checked that our CNAME record is correct. Please let me know as I read previous issues that there was an issue with the downstream SSL provider.

Here is my site Read-Only: LINK