Books
Why is it every time I try to read a book I just purchased it waits about 10 seconds and then tells me “failed to load book requested resource is missing
Check the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
Check Wi-Fi network, see this Apple article: Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639