Well this is just rubbish.
I'm in the UK so just got the ability to enable ADP on iCloud, and I sync all my EnPass with iCloud.
I enabled ADP, and now EnPass cannot and will not sync to iCloud. The apparent solution above does not work, as nothing I do can get EnPass to connect to iCloud.
The only solution for me currently is to disable ADP, which gets EnPass working again.