The tickets went on sale at 5 a.m. on ravinia.org. But many people complained about issues with credit card processing.
Festival officials tweeted around 5:45 a.m. that it's investigating and thanked customers for their patience.
We are investigating. Thank you for your patience and please stay tuned. https://t.co/0UEAtVUj0b— Ravinia Festival (@RaviniaFestival) April 26, 2016
About an hour later, Ravinia tweeted that everything should be back to normal.
We have assurances from @AuthorizeNet that everything is flowing normally. Thank you for your patience.— Ravinia Festival (@RaviniaFestival) April 26, 2016
More than 140 concerts are scheduled at the north suburban venue from June 2 to Sept. 11. This year's highlights include Bob Dylan, Patti LaBelle, Diana Ross, Frankie Valli, Duran Duran, Lauryn Hill, Dolly Parton and Tony Bennett. Check out the full calendar at ravinia.org/calendar.