Cross-Origin Read Blocking (CORB) Issue with getting JSON data

Question

When I click "Get Key", it keeps saying:

Cross-Origin Read Blocking (CORB) blocked cross-origin response https://www.infinityfree.net/errors/404/ with MIME type text/html. See https://www.chromestatus.com/feature/5629709824032768 for more details.

I have tried some method like How to stop CORB from blocking requests to data resources that respond with CORS headers? but still having the same issue.

My Script:

<script>
        function getKey()
        {
            var database = $.getJSON('https://lynzvhub.xyz/Key/Data.json.php', function(data){
                const keys = Object.keys(data); 
                var copyKey = document.getElementById("KeyDisplay");
                document.getElementById('KeyDisplay').value = keys[Math.floor(Math.random()*49)]
                document.getElementById('Button').textContent = "Copied Key"
                copyKey.select();
                navigator.clipboard.writeText(copyKey.value);
            });
        }
    </script>