I installed 2.1.0 but can't get past Step 1 during checkout and missing Store Pickup

I installed 2.1.0 but can't get past "Step 1 Select Shipping Method" during checkout and the radio button is missing for Store Pickup too. Also, the shipping estimator will not calculate the shipping rate, but the shipping rate does show up in the shopping cart. My webhost has PHP 8.1 installed. My previous shopping cart stopped working because of the PHP update my webhost made. So, I need these problems fixed, as no shopping cart is working right now! I have no error messages in the logs pointing at this problem, nor is there any error on my webhost server, but the webhost does not seem to post PHP errors.

I reload several files to Zen Cart, hoping if one had a bad upload, that it might work. But that did not help. What should I look for for these 3 problems???
On my "Step 1 Select Shipping Method" source view page, there seems to be a java error message. I will list that below. There are no buttons on the page to allow me to go to checkout page 2. What should I look for for these 4 problems???
Attachment 20881

Error Step 1 checkup page from page "View Source"

jQuery.ajax(jqXHRSettings);
}).fail(function(jqXHR, textStatus, errorThrown) {
var response = jqXHR.getResponseHeader('status');
var responseHtml = jqXHR.responseText;
var contentType = jqXHR.getResponseHeader("content-type");
switch (response)
{
case '403 Forbidden':
var jsonResponse = JSON.parse(jqXHR.responseText);
var errorType = jsonResponse.errorType;
switch (errorType)
{
case 'ADMIN_BLOCK_WARNING':
break;
case 'AUTH_ERROR':
break;
case 'SECURITY_TOKEN':
break;

default:
alert('An Internal Error of type '+errorType+' was received while processing an ajax call. The action you requested could not be completed.');
}
break;
default:
if (jqXHR.status === 200) {
if (contentType.toLowerCase().indexOf("text/html") >= 0) {
document.open();
document.write(responseHtml);
document.close();