Location Push Service Extension. CLLocationPushServiceErrorDomain Code: 1

I'm following Apple guidelines to add the Location Push Service Extension to our app.

I followed these steps:

• I applied and got approved for Location Push Service Extension.
• My app already asks the user for "Always" permissions for location updates
• I added the entitlement key com.apple.developer.location.push = TRUE
• I added to the project a new Target, and selected Location Push Service Extension from the iOS Application Extension group

I encouter the following issue. When I run the app and call

startMonitoringLocationPushes(completion:)

I receive the following error:

Error Domain=CLLocationPushServiceErrorDomain Code=1 "(null)"

By looking at Apple documentation for CLLocationPushServiceErrorDomain, code 1 stands for:

missingPushExtension An error code that indicates the app is missing a Location Push Service Extension.

As mentioned beofore I already added the Location Service Extension Target to the project. Any idea of why I receive this error?

Thanks