Posting to /configurations not returning JSON

having some problems posting to the preview env. Our post is to here:
/configurations?bearer_token=

this is the response:

<!DOCTYPE html>
  <html class="threekit">
  <head>
      <meta charset="UTF-8" />
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title></title>
      <link href="https://fonts.googleapis.com/css2?family=Open+Sans&display=swap" rel="stylesheet">
  </head>
  <body>
    <div id="body"></div>
      
      <script>
    window._rollbarConfig = {
      accessToken: "6f134f59304344a79eb33faf807dd0bd",
      captureUncaught: true,
      captureUnhandledRejections: true,
      transform: function(payload) {
        var trace = payload.body.trace;
        var locRegex = /^(https?):\/\/[a-zA-Z0-9._-]+\.threekit\.[cd][eo][mv](.*)/;
        if (trace && trace.frames) {
          for (var i = 0; i < trace.frames.length; i++) {
            var filename = trace.frames[i].filename;
            if (filename) {
              var m = filename.match(locRegex);
              // Be sure that the minified_url when uploading includes 'dynamichost'
              if (m) trace.frames[i].filename = m[1] + '://dynamichost' + m[2];
            }
          }
        }
      },
      payload: {
        environment: "preview",
        client: {
          javascript: {
            code_version: "main-2021-06-15-16-48-52",
            guess_uncaught_frames: true,
            source_map_enabled: true
          }
        }
      },
      autoInstrument: {
        log: false
      }
    };
</script>
      <!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-63905846-6"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', "UA-63905846-6");
</script>
      <script>window.threekitVersionInfo = {"manifest":"{\"tag\":{\"access-tokens-service\":\"main-2021-06-15-16-48-52\",\"analytics-service\":\"main-2021-06-15-16-48-52\",\"app\":\"main-2021-06-15-16-48-52\",\"apps-service\":\"main-2021-06-15-16-48-52\",\"asset-jobs-service\":\"main-2021-06-15-16-48-52\",\"asset-migration\":\"main-2021-06-15-16-48-52\",\"assets-service\":\"main-2021-06-15-16-48-52\",\"cas-service\":\"main-2021-06-15-16-48-52\",\"catalog-service\":\"main-2021-06-15-16-48-52\",\"clara-importer\":\"main-2021-06-15-16-48-52\",\"composite\":\"main-2021-06-15-16-48-52\",\"configurations-service\":\"main-2021-06-15-16-48-52\",\"customers-service\":\"main-2021-06-15-16-48-52\",\"datatables-service\":\"main-2021-06-15-16-48-52\",\"db-metrics\":\"main-2021-06-15-16-48-52\",\"emails-service\":\"main-2021-06-15-16-48-52\",\"exporters\":\"main-2021-06-15-16-48-52\",\"files-service\":\"main-2021-06-15-16-48-52\",\"importers\":\"main-2021-06-15-16-48-52\",\"integration-template-migration\":\"main-2021-06-15-16-48-52\",\"interstitial-service\":\"main-2021-06-15-16-48-52\",\"invites-service\":\"main-2021-06-15-16-48-52\",\"job-sidecar\":\"main-2021-06-15-16-48-52\",\"jobs-service\":\"main-2021-06-15-16-48-52\",\"kafka-migration\":\"main-2021-06-15-16-48-52\",\"layers-service\":\"main-2021-06-15-16-48-52\",\"orders-service\":\"main-2021-06-15-16-48-52\",\"product-import-service\":\"main-2021-06-15-16-48-52\",\"render-vray\":\"main-2021-06-15-16-48-52\",\"render-webgl\":\"main-2021-06-15-16-48-52\",\"users-service\":\"main-2021-06-15-16-48-52\",\"webhooks-service\":\"main-2021-06-15-16-48-52\",\"zip-downloader\":\"main-2021-06-15-16-48-52\"}}","threekitGitSha":"da30085314567869072ac14b36c763417af13206","version":"main-2021-06-15-16-48-52"}
window.threekitconf = {"threekitEnv":"preview","appRoot":"https://preview.threekit.com","assetsApiRoot":"https://preview.threekit.com/api","casApiRoot":"https://preview.threekit.com/api","usersApiRoot":"https://preview.threekit.com/api","projectsApiRoot":"https://preview.threekit.com/api","filesApiRoot":"https://preview.threekit.com/api","filesBucketRoot":"https://storage.googleapis.com/threekit-com-preview-files","jobsApiRoot":"https://preview.threekit.com/api","tasksApiRoot":"https://preview.threekit.com/api","commentsApiRoot":"https://preview.threekit.com/api","notificationsApiRoot":"https://preview.threekit.com/api","productsApiRoot":"https://preview.threekit.com/api","imagePublishApiRoot":"https://preview.threekit.com/api","activitiesApiRoot":"https://preview.threekit.com/api","authApiRoot":"https://preview.threekit.com/api","emailsApiRoot":"https://preview.threekit.com/api","configurationsApiRoot":"https://preview.threekit.com/api","userInvitesApiRoot":"https://preview.threekit.com/api","accessTokensApiRoot":"https://preview.threekit.com/api","assetJobsApiRoot":"https://preview.threekit.com/api","analyticsApiRoot":"https://preview.threekit.com/api","interstitialApiRoot":"https://preview.threekit.com/api","catalogApiRoot":"https://preview.threekit.com/api","ordersApiRoot":"https://preview.threekit.com/api","productJobsApiRoot":"https://preview.threekit.com/api","rollbarToken":"6f134f59304344a79eb33faf807dd0bd","rollbarPlayerToken":"e9ee7f7d5cea415ba8f33091fc75cbab","googleAnalyticsToken":"UA-63905846-6","productImportApiRoot":"https://preview.threekit.com/api","webhooksApiRoot":"https://preview.threekit.com/api","thumbnailsApiRoot":"https://preview.threekit.com/api","layersApiRoot":"https://preview.threekit.com/api","customersApiRoot":"https://preview.threekit.com/api","appsApiRoot":"https://preview.threekit.com/api","datatablesApiRoot":"https://preview.threekit.com/api","agGridKey":"CompanyName=ThreeKit Technologies Inc.,LicensedApplication=ThreeKit Admin,LicenseType=SingleApplication,LicensedConcurrentDeveloperCount=1,LicensedProductionInstancesCount=1,AssetReference=AG-009363,ExpiryDate=17_November_2021_[v2]_MTYzNzEwNzIwMDAwMA==dd883e01cbf54e6fe7ca6130876d0b45"};
var bootstrap = false;</script>

      <!-- Main -->
      <script src="/js/threekit-main.9d29c3fd63a2ec35de42.js"></script>
  </body>
  </html>

Any ideas what I am missing? We are migrating an application over to a new system. Post data seems it match our other dev env.

DM’d you for details. Please message me the complete endpoint you are trying to reach and I will investigate.

For anyone visiting this thread with a similar issue, it was due to an error in the API call and not an issue with the API itself. I will close this thread.