Invalid encryption key - CloudKit (newbie)

[BLUEFROG]

A second welcome @bec

I also suggest reading this post…

Sync Types Explained

First Questions Sync is simple but you need to choose the type of sync method to use. Regarding syncing, the first question you need to ask yourself is, “Do I need a remote sync option?”. Consider these questions… Do you need to sync between machines – especially desktop Macs – in different geographic locations? Do you have a colleague, assistant, significant other, etc. that needs frequent updates to synced data? Are you using a shallow sync, i.e., Download Files: On demand in DEVONthink To …

I’d verify the encryption key you added on the Mac.

1. Do a Spotlight search for Keychain and open the Keychain Access application.
2. In the logins section on the left, look for a key named DEVONcloudy Encryption (name of service) like DEVONcloudy Encryption (Dropbox).
3. Double-click it and check the Show password checkbox. You will be required to enter your Administrative password. (This is the password you use to log into your machine with.)
4. Press Allow (or Always Allow, if desired) and the password will be shown.
5. Take note of the password, then quit Keychain Access.

In DEVONthink To Go’s Settings > Sync: Locations, tap the Edit link, then tap the sync location to open the sync store properties.
Enter the encryption key in both fields and press Save.