Some instances have been reporting that there is a slight issue with the secure checkout button being blocked. Typically this is an issue with a browser or network connection that is preventing a secure payment from being made. We are working to fix this from happening, but we have found that returning to the event dashboard via app.evvnt.com/events and selecting the green button to "Upgrade to Premium" does not experience the same issue.
If you continue to experience issues checking out, then try again using a Google Chrome browser. If that is not the issue, then the most common solution is to clear your cookies and then log back in to make your purchase.
See more about upgrading your event to Premium.