Write to the console when a manually-triggered OM optin fails to load into the DOM as expected.

OptinMonsterManualOptinError.js

jQuery(document).ready( function($){
    $(document).on('OptinMonsterManualOptinError', function( event, data, object ){
      console.log("Oops! There was a problem loading the " + data.optin + '-' + data.type + " manual-trigger optin on this page.");
    });
});