Lost "masterkey.cryptomator"

[SailReal]

This could have at least to possible reasons:

1. As mentioned in the quoted message

   @tobihagemann

   Edit: You should only use this workaround if you are absolutely sure that your vault contents match the latest vault version. If you recover a masterkey file via this method and your vault contents actually match an older vault version, the new masterkey file won’t necessarily “fit” the vault contents.

   Have you made sure that both vaults have been created with the current cryptomator version or have been opened before using this version? By current version I mean Cryptomator in version 1.5.x

2. You have not only lost the masterkey.cryptomator but at least also the root-folder which causes the vault to appear empty. This could be checked with the sanitizer which is still being made fit for the current version.