Any news on this?
I can confirm that 184.108.40.2063 is the last working release on Linux platform. I have 4 vaults connected to the same webdav share mapped to the users home folder, so the path on the server is different for each vault. It seems that the introduction of Enpass-Business in V6.8 has brought some incompatible changes. In 6.8 I can only sync one vault to the webdav share. I get the above mentioned error if I try to restore a second vault.
If this is a feature rather than a bug, the possibility to sync multiple vaults to the same sync share is severely hampered. I don't want to sign up to 4 different cloud providers just for Enpass.
I sincerely hope there is a solution for this issue.