Are you currently using Chrome? Firefox or another broswer?
If Chrome, this link will explain step by step (scroll down after you click the “cookies and site data” tab and you’ll see the “see all” option is near the bottom)
Same for Mozilla follow the link for step by step
Once you search Episode Interactive and clear them, try logging out then back in. 
If that doesn’t fix it, you’ll have to submit a support ticket.