Can't Log-out from Muai app

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for some reason I can’t log-out from my Maui app,
the error is “There could be a misconfiguration in the system or a service outage. We track these errors automatically, but if the problem persists feel free to contact us.”

this is the function:

and this is the MauiProgram.cs

builder.Services.AddSingleton(new Auth0Client(new()
Domain = “”,
ClientId = “____7MPUWKOCVKrqG”,
RedirectUri = “myapp://callback”,
PostLogoutRedirectUri = “myapp://callback”,
Scope = “openid profile email”

and in the Auth0 Dashboard -

what seems to be the problem?