1.0https://theeventscalendar.com/supportzolnayaghttps://theeventscalendar.com/support/author/zolnayag/rich600338<blockquote class="wp-embedded-content" data-secret="2IevUhWghw"><a href="https://theeventscalendar.com/support/forums/topic/license-validation-server-not-available/">License validation server not available</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://theeventscalendar.com/support/forums/topic/license-validation-server-not-available/embed/#?secret=2IevUhWghw" width="600" height="338" title="“License validation server not available” — " data-secret="2IevUhWghw" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> Hi, Our firewall is blocking some the Event Calendar PRO servers. Which IP address should be whitelisted in order to use Event Calendar PRO? Thank you for your answer in advance! Andreas Zolnay