I have a local install of 1Password synced with Dropbox.
I added a second Vault to share it and it worked on the inital PC, but when I tried to connect a second PC it toled me the opvault Dir is empty and yes it was Empty.
I moved all Files from the 1P- Dir to the opvault Dir and now everything works as expected even my Initial PC did not tell me to change anything.
Just wanted to let you know
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided