Hi there. I recently bought two OnlyKeys (one, plus a backup). I set both up using the OnlyKey App on my laptop by following the Plausible Deniability Setup Guide | Docs. I managed to complete up to the end of step 7 for the first one (intended as my primary key, so I skipped step 8), and then I loaded slot 1a (on the 1st profile) with the label “KeePassXC” (so I could tell if the backup had successfully loaded onto my empty backup key), and I then went to the “Backup/Restore” tab in the app and created a backup without any issue.
I then repeated steps 1-7 exactly the same way with the same PINs and the same passphrase (I copy-pasted from a text document for both OnlyKeys for this part of the test, to absolutely sure the passphrase was the same). For step 8, I selected the backup I created, but it flashed red. I opened the 1st profile of the backup OnlyKey, and saw nothing in any of the slots (the backup hadn’t worked). I then went to the “Backup/Restore” tab of the app, entered “config” mode using the 1st-profile PIN, selected the backup file I had created, and pressed “Restore to OnlyKey”. The key flashed red the way it did before, and the backup had failed.
For reference, I already checked if it was a keyboard settings problem, as I found that was a problem with a previous issue I had, but it didn’t change anything. I also tried lowering the autotype speed in case the backup file itself was being typed out wrong, but that didn’t change anything either.
The only thing I didn’t do was to change all my preferences to what is provided in this image (taken from Plausible Deniability Setup Guide | Docs), because I assumed only the “full wipe” and “backup key mode” settings were important: