Hi Garima,
there are two additional devices (one laptop, one mobile phone) but for those the synchronization is working fine as already mentioned.
The issue exists on a newly setup workstation on which I try to restore my data from a Dropbox account, but which fails with the very same error as in: https://discussion.enpass.io/index.php?/topic/20017-error-while-restoring-data-from-dropbox/&do=findComment&comment=37908
Laptop and workstation have exactly the same configuration. OS and Enpass versions I have mentioned in my prior comment, but it's Fedora 32, Enpass v6.4.1.643.
And I'm not talking about synchronization, but a backup restore from a dropbox account.
By the way, I do have a lifetime license.
Cheers