Xcode-beta strange behaviours

Hello everyone,

I'm new to iOS Developing and also to the SwiftUI, and I am following along with the https://developer.apple.com/tutorials/swiftui/building-lists-and-navigation (on OS 10.15 Catalina & Xcode 11.0 beta-6).


However, Xcode is behaving quite strange, like when I create a new SwiftUI view it leads errors previewing it, although the downloaded files work just fine. In addition, it does not auto-complete. Any suggestions ?

Thanks in advance.

Xcode-beta strange behaviours
 
 
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