CANNOT EVEN OPEN eReader app – Chegg eReader Review

Hello, I cannot even open my Chegg eReader app. I downloaded the app on my iPad and iPhone 8 Plus, but it seems the app cant seem to open. However, when I tried to read my eBooks in Safari I don’t have any problems. Please fix this. I spent almost $60 on my books and need them to pass my class.
Review by Evi_680 on Chegg eReader.