Tag the question with tag DB_Errors, so I don't overlook it.
This is starting point for all errors related things.
There select Watch List And click Go to apps server.
That should redirect you to
Where you have to login with Wikitree credentials. (email and password)
When you do that, your watchlist is retrieved and you are redirected to my server
Where you get the errors.
If it doesn't work, let me know where you are stucked.