Creating vault and directly inviting users fails

[bakkdoor]

When creating a new vault and inviting users from the vault dialog during creation, the invited user does not get added.

Error in daemon:

2019-10-15 05:30:57 [I] Getting a list of vaults
2019-10-15 05:30:57 [I] Getting a list of vaults
2019-10-15 05:30:57 [E] Exception in connection
Traceback (most recent call last):
  File "syncrypt/backends/binary.py", line 1088, in _acquire_connection
    yield conn
  File "syncrypt/backends/binary.py", line 1181, in add_vault_user
    return (await conn.add_vault_user(user_id, identity))
  File "syncrypt/backends/binary.py", line 817, in add_vault_user
    revision.sign(identity=identity)
  File "syncrypt/models/revision.py", line 148, in sign
    self.assert_valid()
  File "syncrypt/models/revision.py", line 69, in assert_valid
    raise InvalidRevision("Invalid vault_id: {0}".format(self.vault_id))
syncrypt.exceptions.InvalidRevision: Invalid vault_id: None
2019-10-15 05:30:57 [I] 127.0.0.1 [15/Oct/2019:03:30:56 +0000] "POST /v1/vault/..../users/ HTTP/1.1" 500 243 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) ..."