hey @Georges_Jamous did you just found a solution? I also have a iOS-Sync App and run into the issue when i am using some serverside javascript functions.
@Sumedha_Mehta1 I had contact with you in April via mail. You suggest me this workaround:
Sounds like you’re asking for nullability support in our types. This is something we’re currently working on, but in the meantime I would suggest using the empty string, or some other dummy string because the InvalidTypeError is important for Sync.
Do you have maybe an update for this?