X theme v.4.1.1 can't validate

I just noticed that an old site I have is still running X theme v.4.1.1. Even though it was previously validated, it apparently never auto updated as advertised. When I try to validate again it fails to establish a connection. After appending “&x-verbose=1” to the URL, I get the following details:

array(1) {
  array(6) {
    string(1592) "<!DOCTYPE html>
    <title>Themeco Apex | Error (404)</title>
    <meta name="viewport" content="width=device-width" />
    <link href="https://fonts.googleapis.com/css?family=Roboto:400,400i,700,700i" rel="stylesheet">
      * {
        box-sizing: inherit;

      html {
        font-family: Roboto, sans-serif;
        font-size: calc(10px + 1.25vw);
        font-weight: 400;
        line-height: 1.5;
        box-sizing: border-box;

      body {
        display: -webkit-flex;
        display: flex;
        -webkit-flex-flow: column nowrap;
                flex-flow: column nowrap;
        -webkit-justify-content: center;
                justify-content: center;
        -webkit-align-items: center;
                align-items: center;
        min-height: 100vh;
        margin: 0;
        padding: 2rem;

      p {
        width: 100%;
        max-width: 21rem;
        margin-left: auto;
        margin-right: auto;

      h1 {
        margin-top: 0;
        margin-bottom: 0;
        letter-spacing: -0.015em;
        line-height: 1.1;
        font-size: 2.5rem;

      p {
        margin-top: 1rem;
        margin-bottom: 0;
    <h1>Not found.</h1>
    <p>It seems as though the page you're trying to access does not exist or has been moved.</p>
    <p>Please click the back button in your browser and try your action again.</p>
    array(2) {
      string(3) "404"
      string(9) "Not Found"
    array(0) {
    string(0) ""

I need to update the theme and Cornerstone, as the latter stopped working suddenly.

Hi There @alfgundersen

Thanks for writing in! Our validation process will not be initiated correctly when you’re using an older version of X theme and Cornerstone. You can check the latest version numbers from here (https://theme.co/apex/forum/t/troubleshooting-version-compatibility/195) and update manually for once (https://theme.co/apex/forum/t/setup-updating-your-themes-and-plugins/62).

Then you should be able to validate your license. You can also check our product validation guide for detailed information (https://theme.co/apex/forum/t/setup-product-validation/55).

Hope that helps.

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