Unable to access vault on iCloud drive via iPhone 5s

I installed cryptomator on the desktop of iMac and the iPhone. Desktop works fine. I used desktop to create a vault on iCloud Drive. Creation worked, BUT when I opened the iOS app and selected Add existing vault there was no vault on the list to select. I checked the drive using the iCloud Drive app and the vault is there.

Please help, unless I can make this work, the iOS app is of no use to me.

Hi. Can you please check if you can create a vault with iPhone app on iCloud?

If you do that, cryptomator generates a readme file in the folder which you can access on iCloud with further information.

Great! Problem solved. Thanks a million. This should really be included in the instructions where they tell you that a file must be created on the iCloud Drive.