I had the same problem with Evernote not being able to open any notes after upgrading to Android 10. It always said they were "unavailable". It turns out I was running Evernote 8.6.1 (pretty old!) and it wasn't compatible with the new Android system security features. As soon as I went to Google Play and upgraded to Evernote 8.12, everything worked fine.
I was having the same problem, went to google play and updated and now all works fine. Thank you for the advice
The note is currently unavailable.
in Evernote for Android Issues (Versions 8.13.3 and under)
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I was having the same problem, went to google play and updated and now all works fine. Thank you for the advice