What usually fixes this is a clearing of your browser's cache however if that does not fix the spinning wheel and lack of access to the event try either a different browser or using incognito mode on the browser you are using. Of course you can also send in a ticket for us to look directly at your account.
Other browser, that I never use, helped. But then on browser I use all the time problem is still there. And I have problem only with Chios. Browser is Firefox