After update to WP 5.7.2, valid wildcard SSL cert not recognized for WWW

I’m stumped. I host a nonprofit’s multisite, with several subdomains including https://WWW., EDU., and etc.

It’s hosted on GoDaddy Linux (cpanel). The SSL cert is a wildcard for *.wvforlife.org — and it does not expire until December 2021.

Before updating to WP 5.7.2, the cert was fine, accepted by all browsers for all subdomains. However, after I updated to WP 5.7.2, this valid wildcard SSL cert is not recognized for WWW subdomain anymore.

I’m getting this in Chrome:

This site can’t be reached
The webpage at https://www.wvforlife.org/ might be temporarily down or it may have moved permanently to a new web address.
ERR_HTTP2_PROTOCOL_ERROR

I’m getting this in Firefox:

Secure Connection Failed

An error occurred during a connection to https://www.wvforlife.org.

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.

I’m getting this in Safari:

Safari Can’t Open the Page

Safari can’t open the page. The error is: “The operation couldn’t be completed. Protocol error” (NSPOSIXErrorDomain:100).

I tried several variations on the .htaccess file. I tried with it deleted. I tried with it streamlined to exclude all the anti-hacking data and IP addresses added by iTheme Security plugin. I made sure to revisit the original network setup to copy and paste the WordPress issued .htaccess code, i.e. fresh start.

Speaking of fresh start, I double checked the original configuration’s content for adding to the wp-config.php file. It’s all correct, except I have the current domain shown as the naked domain (no subdomain) instead of what it suggests, ‘new.wvforlife.org’ … and that setup (naked domain) has always worked fine for years. Here’s what is shown in my config:

define(‘MULTISITE’, true);
define(‘SUBDOMAIN_INSTALL’, true);
define(‘DOMAIN_CURRENT_SITE’, ‘wvforlife.org’);
define(‘PATH_CURRENT_SITE’, ‘/’);
define(‘SITE_ID_CURRENT_SITE’, 1);
define(‘BLOG_ID_CURRENT_SITE’, 1);

I’m not a master of internet security. I have always been competent enough to get SSL certs bought and installed and working. I’m baffled on this. Can anyone give me any pointers or steer me in the right direction? Thanks in advance!

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