Update 16.0.05 to 16.0.6- External storage smb/cifs broken

A few days ago i updated from 16.05-16.06 and I faced strange behaviours within the “external storage app” smb/cifs storage are no longer to be edited and they can not be changed. Even to
create a new smb storage point is not saved, a red circle sign is shown.

Thank you for the advice. After I set : ```
->setFlag(DefinitionParameter::FLAG_OPTIONAL),
in SMB.php I could use the app as usual