Adding Attachments to Calendar Events on iPad
Is there any way to add an attachment to a calendar event via my iPhone or iPad? I have tried visiting iCloud.com on my iPad, but when I go to Calendar on iCloud.com and go to the event I want to add an attachment to, I click Add File... but absolutely nothing happens. Any ideas would be appreciated. I know I can add attachments using the Calendar app on my MacBook but I want to be able to do it via my iPad or iPhone.
iPad Pro Wi-Fi, iOS 11.1